diff --git a/build/windows/HGTest/HGTestDlg.cpp b/build/windows/HGTest/HGTestDlg.cpp
index 7fa5a21a..90e5934e 100644
--- a/build/windows/HGTest/HGTestDlg.cpp
+++ b/build/windows/HGTest/HGTestDlg.cpp
@@ -130,7 +130,7 @@ BOOL CHGTestDlg::OnInitDialog()
 	HGSane_CreateManager("sane.dll", &m_saneMgr);
 #else
 	HGTwain_LoadDSM(&m_dsm);
-	HGTwain_OpenDSM(m_dsm, m_hWnd, DSEventCallback, this);
+	HGTwain_OpenDSM(m_dsm, m_hWnd);
 #endif
 
 	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
@@ -195,7 +195,7 @@ void CHGTestDlg::OnBnClickedButton1()
 
 	HGChar errInfo[256];
 	HGSane_OpenDevice(m_saneMgr, 0, &m_saneDev, errInfo, 256);
-	HGResult ret = HGSane_StartDevice(m_saneDev, SaneDeviceEventCallback, this, SaneDeviceImageCallback, this, errInfo, 256);
+	HGResult ret = HGSane_StartDevice(m_saneDev, DeviceEventCallback, this, DeviceImageCallback, this, errInfo, 256);
 	if (HGBASE_ERR_OK != ret)
 	{
 		HGSane_CloseDevice(m_saneDev);
@@ -211,7 +211,7 @@ void CHGTestDlg::OnBnClickedButton1()
 	if (NULL != m_ds)
 	{
 		HGTwain_OpenDS(m_ds);
-		HGTwain_EnableDS(m_ds, HGTRUE, NULL);
+		HGTwain_EnableDS(m_ds, HGTRUE, m_hWnd, DSEventCallback, this);
 	}
 #endif
 }
@@ -229,12 +229,12 @@ void CHGTestDlg::OnBnClickedButton2()
 }
 
 #ifdef USE_SANE
-void HGAPI CHGTestDlg::SaneDeviceEventCallback(HGSaneDevice dev, HGUInt error, const HGChar* errInfo, HGPointer param)
+void HGAPI CHGTestDlg::DeviceEventCallback(HGSaneDevice dev, HGUInt error, const HGChar* errInfo, HGPointer param)
 {
 	CHGTestDlg* p = (CHGTestDlg*)param;
 	::PostMessage(p->m_hWnd, 2000, 0, 0);
 }
-void HGAPI CHGTestDlg::SaneDeviceImageCallback(HGSaneDevice dev, HGImage image, HGPointer param)
+void HGAPI CHGTestDlg::DeviceImageCallback(HGSaneDevice dev, HGImage image, HGPointer param)
 {
 	CHGTestDlg* p = (CHGTestDlg*)param;
 
@@ -248,29 +248,21 @@ void CHGTestDlg::DSEventCallback(HGTwainDS ds, HGUInt event, HGPointer param)
 	CHGTestDlg* p = (CHGTestDlg*)param;
 	if (HGTWAIN_DSEVENT_XFERREADY == event)
 	{
-		ULONG idx = 0;
-
-		HGImage image = NULL;
-		HGTwain_ImageNativeXfer(p->m_ds, 0, HGBASE_IMGORIGIN_TOP, &image);
-		CStringA strName;
-		strName.Format("D:\\Twain_%u.bmp", idx);
-		HGImgFmt_SaveImage(image, 0, NULL, strName);
-		HGBase_DestroyImage(image);
-
-		HGUInt count = 0;
-		HGTwain_EndXfer(p->m_ds, &count);
-		while (count != 0)
+		while (1)
 		{
-			++idx;
-
 			HGImage image = NULL;
-			HGTwain_ImageNativeXfer(p->m_ds, 0, HGBASE_IMGORIGIN_TOP, &image);
+			HGTwain_ImageNativeXfer(p->m_ds, 0, 0, &image);
 			CStringA strName;
-			strName.Format("D:\\Twain_%u.bmp", idx);
+			strName.Format("D:\\Twain_%u.jpg", p->m_idx++);
 			HGImgFmt_SaveImage(image, 0, NULL, strName);
 			HGBase_DestroyImage(image);
 
+			HGUInt count = 0;
 			HGTwain_EndXfer(p->m_ds, &count);
+			if (0 == count)
+			{
+				break;
+			}
 		}
 
 		HGTwain_Reset(p->m_ds);
diff --git a/build/windows/HGTest/HGTestDlg.h b/build/windows/HGTest/HGTestDlg.h
index 27d82c67..954ffe6a 100644
--- a/build/windows/HGTest/HGTestDlg.h
+++ b/build/windows/HGTest/HGTestDlg.h
@@ -25,8 +25,8 @@ protected:
 #ifdef USE_SANE
 	HGSaneManager m_saneMgr;
 	HGSaneDevice m_saneDev;
-	static void HGAPI SaneDeviceEventCallback(HGSaneDevice dev, HGUInt error, const HGChar* errInfo, HGPointer param);
-	static void HGAPI SaneDeviceImageCallback(HGSaneDevice dev, HGImage image, HGPointer param);
+	static void HGAPI DeviceEventCallback(HGSaneDevice dev, HGUInt error, const HGChar* errInfo, HGPointer param);
+	static void HGAPI DeviceImageCallback(HGSaneDevice dev, HGImage image, HGPointer param);
 #else
 	HGTwainDSM m_dsm;
 	HGTwainDS m_ds;
diff --git a/modules/base/HGImage.cpp b/modules/base/HGImage.cpp
index 413725ee..a9814cbb 100644
--- a/modules/base/HGImage.cpp
+++ b/modules/base/HGImage.cpp
@@ -511,6 +511,11 @@ static HGResult LoadGdiImage(Gdiplus::Image* pImage, const HGImageRoi* roi, HGUI
 		type = GetType(pImage);
 	}
 
+	if (0 == origin)
+	{
+		origin = HGBASE_IMGORIGIN_TOP;
+	}
+
 	HGResult ret = HGBase_CreateImage(roi2.right - roi2.left, roi2.bottom - roi2.top, type, origin, image);
 	if (HGBASE_ERR_OK != ret)
 	{
@@ -598,15 +603,17 @@ HGResult HGAPI HGBase_CreateImageFromDIB(HGLOBAL hMem, const HGImageRoi* roi,
 			Gdiplus::GdiplusStartup(&nToken, &input, &output);
 			assert(0 != nToken);
 
-			Gdiplus::Image img(pStream);
-			Gdiplus::Status status = img.GetLastStatus();
+			Gdiplus::Image *img = new Gdiplus::Image(pStream);
+			Gdiplus::Status status = img->GetLastStatus();
 			if (Gdiplus::Ok == status)
 			{
-				ret = LoadGdiImage(&img, roi, type, origin, image);
+				ret = LoadGdiImage(img, roi, type, origin, image);
 			}
 
+			delete img;
 			Gdiplus::GdiplusShutdown(nToken);
 			nToken = 0;
+
 			pStream->Release();
 		}
 
diff --git a/modules/sane_user/HGSane.cpp b/modules/sane_user/HGSane.cpp
index 1a00a7da..59fe5d9e 100644
--- a/modules/sane_user/HGSane.cpp
+++ b/modules/sane_user/HGSane.cpp
@@ -101,8 +101,8 @@ HGResult HGAPI HGSane_GetDeviceHandle(HGSaneDevice dev, SANE_Handle* handle)
 	return saneDeviceImpl->GetHandle(handle);
 }
 
-HGResult HGAPI HGSane_StartDevice(HGSaneDevice dev, HGSane_DeviceEventCallback eventFunc, HGPointer eventParam,
-	HGSane_DeviceImageCallback imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen)
+HGResult HGAPI HGSane_StartDevice(HGSaneDevice dev, HGSane_DeviceEventFunc eventFunc, HGPointer eventParam,
+	HGSane_DeviceImageFunc imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen)
 {
 	if (NULL == dev)
 	{
diff --git a/modules/sane_user/HGSane.h b/modules/sane_user/HGSane.h
index 502332bc..33f3fbcc 100644
--- a/modules/sane_user/HGSane.h
+++ b/modules/sane_user/HGSane.h
@@ -12,8 +12,8 @@ HG_DECLARE_HANDLE(HGSaneDevice);
 
 /* Sane设备回调
 */
-typedef void (HGAPI* HGSane_DeviceEventCallback)(HGSaneDevice dev, HGUInt error, const HGChar *errInfo, HGPointer param);
-typedef void (HGAPI* HGSane_DeviceImageCallback)(HGSaneDevice dev, HGImage image, HGPointer param);
+typedef void (HGAPI* HGSane_DeviceEventFunc)(HGSaneDevice dev, HGUInt error, const HGChar *errInfo, HGPointer param);
+typedef void (HGAPI* HGSane_DeviceImageFunc)(HGSaneDevice dev, HGImage image, HGPointer param);
 
 HGEXPORT HGResult HGAPI HGSane_CreateManager(const HGChar *sanePath, HGSaneManager* mgr);
 
@@ -29,8 +29,8 @@ HGEXPORT HGResult HGAPI HGSane_CloseDevice(HGSaneDevice dev);
 
 HGEXPORT HGResult HGAPI HGSane_GetDeviceHandle(HGSaneDevice dev, SANE_Handle *handle);
 
-HGEXPORT HGResult HGAPI HGSane_StartDevice(HGSaneDevice dev, HGSane_DeviceEventCallback eventFunc, HGPointer eventParam,
-	HGSane_DeviceImageCallback imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen);
+HGEXPORT HGResult HGAPI HGSane_StartDevice(HGSaneDevice dev, HGSane_DeviceEventFunc eventFunc, HGPointer eventParam,
+	HGSane_DeviceImageFunc imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen);
 
 HGEXPORT HGResult HGAPI HGSane_StopDevice(HGSaneDevice dev);
 
diff --git a/modules/sane_user/HGSaneImpl.cpp b/modules/sane_user/HGSaneImpl.cpp
index c2f6c5a6..87dc74f0 100644
--- a/modules/sane_user/HGSaneImpl.cpp
+++ b/modules/sane_user/HGSaneImpl.cpp
@@ -234,9 +234,9 @@ void HGSaneManagerImpl::RemoveDevice(class HGSaneDeviceImpl* deviceImpl)
 }
 
 
-HGSaneDeviceImpl::HGSaneDeviceImpl(HGSaneManagerImpl* mgr)
+HGSaneDeviceImpl::HGSaneDeviceImpl(HGSaneManagerImpl* mgrImpl)
 {
-	m_mgrImpl = mgr;
+	m_mgrImpl = mgrImpl;
 	m_devHandle = NULL;
 	m_buffer = NULL;
 	m_bufferSize = 0;
@@ -312,8 +312,8 @@ HGResult HGSaneDeviceImpl::GetHandle(SANE_Handle* handle)
 	return HGBASE_ERR_OK;
 }
 
-HGResult HGSaneDeviceImpl::Start(HGSane_DeviceEventCallback eventFunc, HGPointer eventParam,
-	HGSane_DeviceImageCallback imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen)
+HGResult HGSaneDeviceImpl::Start(HGSane_DeviceEventFunc eventFunc, HGPointer eventParam,
+	HGSane_DeviceImageFunc imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen)
 {
 	if (NULL != m_thread)
 	{
diff --git a/modules/sane_user/HGSaneImpl.hpp b/modules/sane_user/HGSaneImpl.hpp
index d94e3640..2be2e289 100644
--- a/modules/sane_user/HGSaneImpl.hpp
+++ b/modules/sane_user/HGSaneImpl.hpp
@@ -63,14 +63,14 @@ private:
 class HGSaneDeviceImpl
 {
 public:
-	HGSaneDeviceImpl(HGSaneManagerImpl* mgr);
+	HGSaneDeviceImpl(HGSaneManagerImpl* mgrImpl);
 	~HGSaneDeviceImpl();
 
 	HGResult Open(const HGChar *devName, HGChar* errInfo, HGUInt errInfoLen);
 	HGResult Close();
 	HGResult GetHandle(SANE_Handle* handle);
-	HGResult Start(HGSane_DeviceEventCallback eventFunc, HGPointer eventParam,
-		HGSane_DeviceImageCallback imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen);
+	HGResult Start(HGSane_DeviceEventFunc eventFunc, HGPointer eventParam,
+		HGSane_DeviceImageFunc imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen);
 	HGResult Stop();
 
 private:
@@ -78,14 +78,14 @@ private:
 	static void HGAPI ThreadFunc(HGThread thread, HGPointer param);
 
 private:
-	class HGSaneManagerImpl* m_mgrImpl;
+	HGSaneManagerImpl* m_mgrImpl;
 	SANE_Handle m_devHandle;
 	HGByte* m_buffer;
 	HGInt m_bufferSize;
 	HGUInt m_dpi;
-	HGSane_DeviceEventCallback m_eventFunc;
+	HGSane_DeviceEventFunc m_eventFunc;
 	HGPointer m_eventParam;
-	HGSane_DeviceImageCallback m_imageFunc;
+	HGSane_DeviceImageFunc m_imageFunc;
 	HGPointer m_imageParam;
 	volatile HGBool m_stopThread;
 	HGThread m_thread;
diff --git a/modules/twain_user/HGTwain.cpp b/modules/twain_user/HGTwain.cpp
index 94e3be9e..a4f5b3e4 100644
--- a/modules/twain_user/HGTwain.cpp
+++ b/modules/twain_user/HGTwain.cpp
@@ -38,7 +38,7 @@ HGResult HGAPI HGTwain_UnloadDSM(HGTwainDSM dsm)
 	return HGBASE_ERR_OK;
 }
 
-HGResult HGAPI HGTwain_OpenDSM(HGTwainDSM dsm, HWND hwnd, HGDSEventFunc func, HGPointer param)
+HGResult HGAPI HGTwain_OpenDSM(HGTwainDSM dsm, HWND hwnd)
 {
 	if (NULL == dsm)
 	{
@@ -46,7 +46,7 @@ HGResult HGAPI HGTwain_OpenDSM(HGTwainDSM dsm, HWND hwnd, HGDSEventFunc func, HG
 	}
 
 	HGTwainDSMImpl* twainDSMImpl = (HGTwainDSMImpl*)dsm;
-	return twainDSMImpl->OpenDSM(hwnd, func, param);
+	return twainDSMImpl->OpenDSM(hwnd);
 }
 
 HGResult HGAPI HGTwain_CloseDSM(HGTwainDSM dsm)
@@ -101,7 +101,7 @@ HGResult HGAPI HGTwain_GetDSName(HGTwainDS ds, HGChar* name, HGUInt maxLen)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->GetDSName(twainDSImpl, name, maxLen);
+	return twainDSImpl->GetName(name, maxLen);
 }
 
 HGResult HGAPI HGTwain_OpenDS(HGTwainDS ds)
@@ -112,7 +112,7 @@ HGResult HGAPI HGTwain_OpenDS(HGTwainDS ds)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->OpenDS(twainDSImpl);
+	return twainDSImpl->Open();
 }
 
 HGResult HGAPI HGTwain_CloseDS(HGTwainDS ds)
@@ -123,7 +123,7 @@ HGResult HGAPI HGTwain_CloseDS(HGTwainDS ds)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->CloseDS(twainDSImpl);
+	return twainDSImpl->Close();
 }
 
 HGResult HGAPI HGTwain_SetCapability(HGTwainDS ds, HGUInt cap, HGInt value)
@@ -134,7 +134,7 @@ HGResult HGAPI HGTwain_SetCapability(HGTwainDS ds, HGUInt cap, HGInt value)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->SetCapability(twainDSImpl, cap, value);
+	return twainDSImpl->SetCap(cap, value);
 }
 
 HGResult HGAPI HGTwain_GetCapability(HGTwainDS ds, HGUInt cap, HGInt* value)
@@ -145,10 +145,10 @@ HGResult HGAPI HGTwain_GetCapability(HGTwainDS ds, HGUInt cap, HGInt* value)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->GetCapability(twainDSImpl, cap, value);
+	return twainDSImpl->GetCap(cap, value);
 }
 
-HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND parent)
+HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param)
 {
 	if (NULL == ds)
 	{
@@ -156,10 +156,10 @@ HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND parent)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->EnableDSUIOnly(twainDSImpl, showUI, parent);
+	return twainDSImpl->EnableUIOnly(showUI, parent, func, param);
 }
 
-HGResult HGAPI HGTwain_EnableDS(HGTwainDS ds, HGBool showUI, HWND parent)
+HGResult HGAPI HGTwain_EnableDS(HGTwainDS ds, HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param)
 {
 	if (NULL == ds)
 	{
@@ -167,7 +167,7 @@ HGResult HGAPI HGTwain_EnableDS(HGTwainDS ds, HGBool showUI, HWND parent)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->EnableDS(twainDSImpl, showUI, parent);
+	return twainDSImpl->Enable(showUI, parent, func, param);
 }
 
 HGResult HGAPI HGTwain_DisableDS(HGTwainDS ds)
@@ -178,7 +178,7 @@ HGResult HGAPI HGTwain_DisableDS(HGTwainDS ds)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->DisableDS(twainDSImpl);
+	return twainDSImpl->Disable();
 }
 
 HGResult HGAPI HGTwain_ImageNativeXfer(HGTwainDS ds, HGUInt type, HGUInt origin, HGImage* image)
@@ -189,7 +189,7 @@ HGResult HGAPI HGTwain_ImageNativeXfer(HGTwainDS ds, HGUInt type, HGUInt origin,
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->ImageNativeXfer(twainDSImpl, type, origin, image);
+	return twainDSImpl->ImageNativeXfer(type, origin, image);
 }
 
 HGResult HGAPI HGTwain_EndXfer(HGTwainDS ds, HGUInt* count)
@@ -200,7 +200,7 @@ HGResult HGAPI HGTwain_EndXfer(HGTwainDS ds, HGUInt* count)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->EndXfer(twainDSImpl, count);
+	return twainDSImpl->EndXfer(count);
 }
 
 HGResult HGAPI HGTwain_Reset(HGTwainDS ds)
@@ -211,5 +211,5 @@ HGResult HGAPI HGTwain_Reset(HGTwainDS ds)
 	}
 
 	HGTwainDSImpl* twainDSImpl = (HGTwainDSImpl*)ds;
-	return twainDSImpl->dsmImpl->Reset(twainDSImpl);
+	return twainDSImpl->Reset();
 }
\ No newline at end of file
diff --git a/modules/twain_user/HGTwain.h b/modules/twain_user/HGTwain.h
index 94e04a35..b9b1e42d 100644
--- a/modules/twain_user/HGTwain.h
+++ b/modules/twain_user/HGTwain.h
@@ -54,7 +54,7 @@ HGEXPORT HGResult HGAPI HGTwain_UnloadDSM(HGTwainDSM dsm);
 * 1) 执行此函数后，TWAIN状态从2变为3
 * 2) 调用该函数的线程需要有消息循环
 */
-HGEXPORT HGResult HGAPI HGTwain_OpenDSM(HGTwainDSM dsm, HWND hwnd, HGDSEventFunc func, HGPointer param);
+HGEXPORT HGResult HGAPI HGTwain_OpenDSM(HGTwainDSM dsm, HWND hwnd);
 
 /* 关闭DSM
 * 参数:
@@ -150,7 +150,7 @@ HGEXPORT HGResult HGAPI HGTwain_GetCapability(HGTwainDS ds, HGUInt cap, HGInt* v
 * 说明:
 * 1) 执行此函数后，TWAIN状态从4变为5
 */
-HGEXPORT HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND parent);
+HGEXPORT HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param);
 
 /* 启动DS
 * 参数:
@@ -162,7 +162,7 @@ HGEXPORT HGResult HGAPI HGTwain_EnableDSUIOnly(HGTwainDS ds, HGBool showUI, HWND
 * 说明:
 * 1) 执行此函数后，TWAIN状态从4变为5
 */
-HGEXPORT HGResult HGAPI HGTwain_EnableDS(HGTwainDS ds, HGBool showUI, HWND parent);
+HGEXPORT HGResult HGAPI HGTwain_EnableDS(HGTwainDS ds, HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param);
 
 /* 停止DS
 * 参数:
diff --git a/modules/twain_user/HGTwainImpl.cpp b/modules/twain_user/HGTwainImpl.cpp
index 54c961ec..d57261ce 100644
--- a/modules/twain_user/HGTwainImpl.cpp
+++ b/modules/twain_user/HGTwainImpl.cpp
@@ -1,5 +1,6 @@
 #include "HGTwainImpl.hpp"
 #include "../base/HGInc.h"
+#include "../base/HGInfo.h"
 
 std::map<HWND, HGTwainDSMImpl*> HGTwainDSMImpl::m_mapWnd;
 
@@ -10,8 +11,6 @@ HGTwainDSMImpl::HGTwainDSMImpl()
 	GetIdentity();
 	m_hWnd = NULL;
 	m_oldWndProc = NULL;
-	m_dsEventFunc = NULL;
-	m_dsEventParam = NULL;
 	m_DSMOpen = HGFALSE;
 }
 
@@ -61,13 +60,18 @@ HGResult HGTwainDSMImpl::UnloadDSM()
 	return HGBASE_ERR_OK;
 }
 
-HGResult HGTwainDSMImpl::OpenDSM(HWND hwnd, HGDSEventFunc func, HGPointer param)
+HGResult HGTwainDSMImpl::OpenDSM(HWND hwnd)
 {
-	if (NULL == m_pDSMProc || m_DSMOpen || NULL == hwnd || NULL == func)
+	if (NULL == m_pDSMProc || m_DSMOpen)
 	{
 		return HGBASE_ERR_FAIL;
 	}
 
+	if (NULL == hwnd)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
 	USHORT ret = m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_PARENT, MSG_OPENDSM, (TW_MEMREF)&hwnd);
 	if (TWRC_SUCCESS != ret)
 	{
@@ -77,8 +81,6 @@ HGResult HGTwainDSMImpl::OpenDSM(HWND hwnd, HGDSEventFunc func, HGPointer param)
 	m_hWnd = hwnd;
 	m_mapWnd[m_hWnd] = this;
 	m_oldWndProc = (WNDPROC)SetWindowLongPtrW(m_hWnd, GWLP_WNDPROC, (LONG_PTR)NewWndProc);
-	m_dsEventFunc = func;
-	m_dsEventParam = param;
 	m_DSMOpen = HGTRUE;
 
 	// 获取DS列表
@@ -86,15 +88,13 @@ HGResult HGTwainDSMImpl::OpenDSM(HWND hwnd, HGDSEventFunc func, HGPointer param)
 	ret = m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_GETFIRST, &ds);
 	if (TWRC_SUCCESS == ret)
 	{
-		HGTwainDSImpl dsImpl(this);
-		memcpy(&dsImpl.ds, &ds, sizeof(TW_IDENTITY));
-		m_DSList.push_back(dsImpl);
+		HGTwainDSImpl* dsImpl = new HGTwainDSImpl(this, &ds);
+		m_vpDSImpl.push_back(dsImpl);
 
 		while (TWRC_SUCCESS == m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_GETNEXT, &ds))
 		{
-			HGTwainDSImpl dsImpl(this);
-			memcpy(&dsImpl.ds, &ds, sizeof(TW_IDENTITY));
-			m_DSList.push_back(dsImpl);
+			HGTwainDSImpl* dsImpl = new HGTwainDSImpl(this, &ds);
+			m_vpDSImpl.push_back(dsImpl);
 		}
 	}
 
@@ -109,13 +109,12 @@ HGResult HGTwainDSMImpl::CloseDSM()
 	}
 
 	// 先必须关闭DS
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
+	for (int i = 0; i < (int)m_vpDSImpl.size(); ++i)
 	{
-		CloseDS(&m_DSList[i]);
+		m_vpDSImpl[i]->Close();
+		delete m_vpDSImpl[i];
 	}
-
-	// 清理DS列表
-	m_DSList.clear();
+	m_vpDSImpl.clear();
 
 	m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_PARENT, MSG_CLOSEDSM, (TW_MEMREF)&m_hWnd);
 	SetWindowLongPtrW(m_hWnd, GWLP_WNDPROC, (LONG_PTR)m_oldWndProc);
@@ -130,28 +129,26 @@ HGResult HGTwainDSMImpl::CloseDSM()
 		}
 	}
 	m_hWnd = NULL;
-	m_dsEventFunc = NULL;
-	m_dsEventParam = NULL;
 	m_DSMOpen = HGFALSE;
 	return HGBASE_ERR_OK;
 }
 
-HGResult HGTwainDSMImpl::GetDSList(HGTwainDSImpl** ds, HGUInt* size)
+HGResult HGTwainDSMImpl::GetDSList(class HGTwainDSImpl** dsImpl, HGUInt* size)
 {
-	if (NULL == ds || NULL == size || 0 == *size)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
 	if (!m_DSMOpen)
 	{
 		return HGBASE_ERR_FAIL;
 	}
 
-	HGUInt count = 0;
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
+	if (NULL == dsImpl || NULL == size || 0 == *size)
 	{
-		ds[i] = &m_DSList[i];
+		return HGBASE_ERR_INVALIDARG;
+	}
+
+	HGUInt count = 0;
+	for (int i = 0; i < (int)m_vpDSImpl.size(); ++i)
+	{
+		dsImpl[i] = m_vpDSImpl[i];
 		++count;
 
 		if (count >= *size)
@@ -164,18 +161,18 @@ HGResult HGTwainDSMImpl::GetDSList(HGTwainDSImpl** ds, HGUInt* size)
 	return HGBASE_ERR_OK;
 }
 
-HGResult HGTwainDSMImpl::GetDefaultDS(HGTwainDSImpl** ds)
+HGResult HGTwainDSMImpl::GetDefaultDS(class HGTwainDSImpl** dsImpl)
 {
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
 	if (!m_DSMOpen)
 	{
 		return HGBASE_ERR_FAIL;
 	}
 
+	if (NULL == dsImpl)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
 	assert(NULL != m_pDSMProc);
 	TW_IDENTITY defDS;
 	USHORT ret = m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_GETDEFAULT, &defDS);
@@ -184,11 +181,11 @@ HGResult HGTwainDSMImpl::GetDefaultDS(HGTwainDSImpl** ds)
 		return HGBASE_ERR_FAIL;
 	}
 
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
+	for (int i = 0; i < (int)m_vpDSImpl.size(); ++i)
 	{
-		if (0 == memcmp(&defDS, &m_DSList[i].ds, sizeof(TW_IDENTITY)))
+		if (0 == memcmp(&defDS, &m_vpDSImpl[i]->m_iden, sizeof(TW_IDENTITY)))
 		{
-			*ds = &m_DSList[i];
+			*dsImpl = m_vpDSImpl[i];
 			return HGBASE_ERR_OK;
 		}
 	}
@@ -196,18 +193,18 @@ HGResult HGTwainDSMImpl::GetDefaultDS(HGTwainDSImpl** ds)
 	return HGBASE_ERR_FAIL;
 }
 
-HGResult HGTwainDSMImpl::SelectDS(HGTwainDSImpl** ds)
+HGResult HGTwainDSMImpl::SelectDS(class HGTwainDSImpl** dsImpl)
 {
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
 	if (!m_DSMOpen)
 	{
 		return HGBASE_ERR_FAIL;
 	}
 
+	if (NULL == dsImpl)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
 	assert(NULL != m_pDSMProc);
 	TW_IDENTITY selectDS;
 	USHORT ret = m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_USERSELECT, &selectDS);
@@ -216,407 +213,11 @@ HGResult HGTwainDSMImpl::SelectDS(HGTwainDSImpl** ds)
 		return HGBASE_ERR_FAIL;
 	}
 
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
+	for (int i = 0; i < (int)m_vpDSImpl.size(); ++i)
 	{
-		if (0 == memcmp(&selectDS, &m_DSList[i].ds, sizeof(TW_IDENTITY)))
+		if (0 == memcmp(&selectDS, &m_vpDSImpl[i]->m_iden, sizeof(TW_IDENTITY)))
 		{
-			*ds = &m_DSList[i];
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::GetDSName(HGTwainDSImpl* ds, HGChar* name, HGUInt maxLen)
-{
-	if (NULL == ds || NULL == name || 0 == maxLen)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	if (!m_DSMOpen)
-	{
-		return HGBASE_ERR_FAIL;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			strcpy_s(name, maxLen, m_DSList[i].ds.ProductName);
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::OpenDS(HGTwainDSImpl* ds)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	if (!m_DSMOpen)
-	{
-		return HGBASE_ERR_FAIL;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (m_DSList[i].open)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			USHORT ret = m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_OPENDS, &m_DSList[i].ds);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			m_DSList[i].open = HGTRUE;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::CloseDS(HGTwainDSImpl* ds)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].open)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			DisableDS(ds);
-			m_pDSMProc(&m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_CLOSEDS, (TW_MEMREF)&m_DSList[i].ds);
-
-			m_DSList[i].open = HGFALSE;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::SetCapability(HGTwainDSImpl* ds, HGUInt cap, HGInt value)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].open)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_UINT16 cap2 = 0;
-			if (HGTWAIN_DSCAP_DUPLEX == cap)
-				cap2 = CAP_DUPLEX;
-			else if (HGTWAIN_DSCAP_DUPLEXENABLED == cap)
-				cap2 = CAP_DUPLEXENABLED;
-			else if (HGTWAIN_DSCAP_XFERCOUNT == cap)
-				cap2 = CAP_XFERCOUNT;
-			if (0 == cap2)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_CAPABILITY twCap;
-			twCap.Cap = (TW_UINT16)cap2;
-			twCap.ConType = TWON_ONEVALUE;
-			twCap.hContainer = GlobalAlloc(GHND, sizeof(TW_ONEVALUE));
-			if (NULL == twCap.hContainer)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			pTW_ONEVALUE pVal = (pTW_ONEVALUE)GlobalLock(twCap.hContainer);
-			assert(NULL != pVal);
-			pVal->ItemType = TWTY_INT32;
-			pVal->Item = (TW_UINT32)value;
-			GlobalUnlock(twCap.hContainer);
-
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_CAPABILITY, MSG_SET, &twCap);
-			if (TWRC_SUCCESS != ret)
-			{
-				GlobalFree(twCap.hContainer);
-				return HGBASE_ERR_FAIL;
-			}
-
-			GlobalFree(twCap.hContainer);
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::GetCapability(HGTwainDSImpl* ds, HGUInt cap, HGInt* value)
-{
-	if (NULL == ds || NULL == value)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].open)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_UINT16 cap2 = 0;
-			if (HGTWAIN_DSCAP_DUPLEX == cap)
-				cap2 = CAP_DUPLEX;
-			else if (HGTWAIN_DSCAP_DUPLEXENABLED == cap)
-				cap2 = CAP_DUPLEXENABLED;
-			else if (HGTWAIN_DSCAP_XFERCOUNT == cap)
-				cap2 = CAP_XFERCOUNT;
-			if (0 == cap2)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_CAPABILITY twCap;
-			twCap.Cap = (TW_UINT16)cap2;
-			twCap.ConType = TWON_ONEVALUE;
-			twCap.hContainer = NULL;
-
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_CAPABILITY, MSG_GETCURRENT, &twCap);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			assert(NULL != twCap.hContainer);
-			pTW_ONEVALUE pVal = (pTW_ONEVALUE)GlobalLock(twCap.hContainer);
-			assert(NULL != pVal);
-			*value = pVal->Item;
-			GlobalUnlock(twCap.hContainer);
-
-			GlobalFree(twCap.hContainer);
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::EnableDSUIOnly(HGTwainDSImpl* ds, HGBool showUI, HWND parent)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].open || m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_USERINTERFACE twUI;
-			twUI.ShowUI = (TW_BOOL)showUI;
-			twUI.hParent = (TW_HANDLE)parent;
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_USERINTERFACE, MSG_ENABLEDSUIONLY, (TW_MEMREF)&twUI);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			m_DSList[i].showUI = showUI;
-			m_DSList[i].parent = parent;
-			m_DSList[i].enable = HGTRUE;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::EnableDS(HGTwainDSImpl* ds, HGBool showUI, HWND parent)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].open || m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_USERINTERFACE twUI;
-			twUI.ShowUI = (TW_BOOL)showUI;
-			twUI.hParent = (TW_HANDLE)parent;
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_USERINTERFACE, MSG_ENABLEDS, (TW_MEMREF)&twUI);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			m_DSList[i].showUI = showUI;
-			m_DSList[i].parent = parent;
-			m_DSList[i].enable = HGTRUE;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::DisableDS(HGTwainDSImpl* ds)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_USERINTERFACE twUI;
-			twUI.ShowUI = (TW_BOOL)m_DSList[i].showUI;
-			twUI.hParent = (TW_HANDLE)m_DSList[i].parent;
-			m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_USERINTERFACE, MSG_DISABLEDS, &twUI);
-
-			m_DSList[i].showUI = HGFALSE;
-			m_DSList[i].parent = NULL;
-			m_DSList[i].enable = HGFALSE;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::ImageNativeXfer(HGTwainDSImpl* ds, HGUInt type, HGUInt origin, HGImage* image)
-{
-	if (NULL == ds || NULL == image)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_IMAGEINFO info;
-			if (TWRC_SUCCESS != m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_IMAGE, DAT_IMAGEINFO, MSG_GET, (TW_MEMREF)&info))
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			HANDLE hMem = NULL;
-			if (TWRC_XFERDONE != m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_IMAGE, DAT_IMAGENATIVEXFER, MSG_GET, &hMem))
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			HGResult ret = HGBase_CreateImageFromDIB(hMem, NULL, type, origin, image);
-			GlobalFree(hMem);
-			return ret;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::EndXfer(HGTwainDSImpl* ds, HGUInt* count)
-{
-	if (NULL == ds || NULL == count)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_PENDINGXFERS twPend;
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_PENDINGXFERS, MSG_ENDXFER, (TW_MEMREF)&twPend);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			*count = twPend.Count;
-			return HGBASE_ERR_OK;
-		}
-	}
-
-	return HGBASE_ERR_FAIL;
-}
-
-HGResult HGTwainDSMImpl::Reset(HGTwainDSImpl* ds)
-{
-	if (NULL == ds)
-	{
-		return HGBASE_ERR_INVALIDARG;
-	}
-
-	for (int i = 0; i < (int)m_DSList.size(); ++i)
-	{
-		if (ds == &m_DSList[i])
-		{
-			if (!m_DSList[i].enable)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
-			TW_PENDINGXFERS twPend;
-			USHORT ret = m_pDSMProc(&m_AppId, &m_DSList[i].ds, DG_CONTROL, DAT_PENDINGXFERS, MSG_RESET, (TW_MEMREF)&twPend);
-			if (TWRC_SUCCESS != ret)
-			{
-				return HGBASE_ERR_FAIL;
-			}
-
+			*dsImpl = m_vpDSImpl[i];
 			return HGBASE_ERR_OK;
 		}
 	}
@@ -652,29 +253,321 @@ LRESULT CALLBACK HGTwainDSMImpl::NewWndProc(HWND hWnd, UINT msg, WPARAM wParam,
 	msg2.wParam = wParam;
 	msg2.lParam = lParam;
 		
-	for (int i = 0; i < (int)p->m_DSList.size(); ++i)
+	for (int i = 0; i < (int)p->m_vpDSImpl.size(); ++i)
 	{
-		if (p->m_DSList[i].enable)
+		if (p->m_vpDSImpl[i]->m_enable)
 		{
 			TW_EVENT twEvent;
 			twEvent.pEvent = (TW_MEMREF)&msg2;
 			twEvent.TWMessage = MSG_NULL;
-			USHORT ret = p->m_pDSMProc(&p->m_AppId, &p->m_DSList[i].ds, DG_CONTROL, DAT_EVENT, 
+			USHORT ret = p->m_pDSMProc(&p->m_AppId, &p->m_vpDSImpl[i]->m_iden, DG_CONTROL, DAT_EVENT,
 				MSG_PROCESSEVENT, (TW_MEMREF)&twEvent);
 			if (TWRC_DSEVENT == ret)
 			{
 				HGUInt event = HGTWAIN_DSEVENT_UNKNOWN;
 				if (MSG_XFERREADY == twEvent.TWMessage)
+				{
+					HGBase_WriteInfo(HGBASE_INFOTYPE_DEBUG, "MSG_XFERREADY");
 					event = HGTWAIN_DSEVENT_XFERREADY;
+				}
 				else if (MSG_CLOSEDSREQ == twEvent.TWMessage)
+				{
+					HGBase_WriteInfo(HGBASE_INFOTYPE_DEBUG, "MSG_CLOSEDSREQ");
 					event = HGTWAIN_DSEVENT_CLOSEDSREQ;
+				}
 				else if (MSG_CLOSEDSOK == twEvent.TWMessage)
+				{
+					HGBase_WriteInfo(HGBASE_INFOTYPE_DEBUG, "MSG_CLOSEDSOK");
 					event = HGTWAIN_DSEVENT_CLOSEDSOK;
+				}
 					
-				p->m_dsEventFunc((HGTwainDS)&p->m_DSList[i], event, p->m_dsEventParam);
+				if (NULL != p->m_vpDSImpl[i]->m_eventFunc)
+					p->m_vpDSImpl[i]->m_eventFunc((HGTwainDS)p->m_vpDSImpl[i], event, p->m_vpDSImpl[i]->m_eventParam);
 			}
 		}
 	}
 
 	return CallWindowProcW(p->m_oldWndProc, hWnd, msg, wParam, lParam);
+}
+
+
+HGTwainDSImpl::HGTwainDSImpl(HGTwainDSMImpl* dsmImpl, const TW_IDENTITY* iden)
+{
+	m_dsmImpl = dsmImpl;
+	memcpy(&m_iden, iden, sizeof(TW_IDENTITY));
+	m_open = HGFALSE;
+	m_showUI = HGFALSE;
+	m_parent = NULL;
+	m_eventFunc = NULL;
+	m_eventParam = NULL;
+	m_enable = HGFALSE;
+}
+
+HGTwainDSImpl::~HGTwainDSImpl()
+{
+
+}
+
+HGResult HGTwainDSImpl::GetName(HGChar* name, HGUInt maxLen)
+{
+	strcpy_s(name, maxLen, m_iden.ProductName);
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::Open()
+{
+	if (m_open)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_OPENDS, &m_iden);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	m_open = HGTRUE;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::Close()
+{
+	if (!m_open)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	Disable();
+	m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_CLOSEDS, (TW_MEMREF)&m_iden);
+
+	m_open = HGFALSE;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::SetCap(HGUInt cap, HGInt value)
+{
+	if (!m_open)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_UINT16 cap2 = 0;
+	if (HGTWAIN_DSCAP_DUPLEX == cap)
+		cap2 = CAP_DUPLEX;
+	else if (HGTWAIN_DSCAP_DUPLEXENABLED == cap)
+		cap2 = CAP_DUPLEXENABLED;
+	else if (HGTWAIN_DSCAP_XFERCOUNT == cap)
+		cap2 = CAP_XFERCOUNT;
+	if (0 == cap2)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_CAPABILITY twCap;
+	twCap.Cap = (TW_UINT16)cap2;
+	twCap.ConType = TWON_ONEVALUE;
+	twCap.hContainer = GlobalAlloc(GHND, sizeof(TW_ONEVALUE));
+	if (NULL == twCap.hContainer)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	pTW_ONEVALUE pVal = (pTW_ONEVALUE)GlobalLock(twCap.hContainer);
+	assert(NULL != pVal);
+	pVal->ItemType = TWTY_INT32;
+	pVal->Item = (TW_UINT32)value;
+	GlobalUnlock(twCap.hContainer);
+
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_CAPABILITY, MSG_SET, &twCap);
+	if (TWRC_SUCCESS != ret)
+	{
+		GlobalFree(twCap.hContainer);
+		return HGBASE_ERR_FAIL;
+	}
+
+	GlobalFree(twCap.hContainer);
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::GetCap(HGUInt cap, HGInt* value)
+{
+	if (!m_open)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	if (NULL == value)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
+	TW_UINT16 cap2 = 0;
+	if (HGTWAIN_DSCAP_DUPLEX == cap)
+		cap2 = CAP_DUPLEX;
+	else if (HGTWAIN_DSCAP_DUPLEXENABLED == cap)
+		cap2 = CAP_DUPLEXENABLED;
+	else if (HGTWAIN_DSCAP_XFERCOUNT == cap)
+		cap2 = CAP_XFERCOUNT;
+	if (0 == cap2)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_CAPABILITY twCap;
+	twCap.Cap = (TW_UINT16)cap2;
+	twCap.ConType = TWON_ONEVALUE;
+	twCap.hContainer = NULL;
+
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_CAPABILITY, MSG_GETCURRENT, &twCap);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	assert(NULL != twCap.hContainer);
+	pTW_ONEVALUE pVal = (pTW_ONEVALUE)GlobalLock(twCap.hContainer);
+	assert(NULL != pVal);
+	*value = pVal->Item;
+	GlobalUnlock(twCap.hContainer);
+
+	GlobalFree(twCap.hContainer);
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::EnableUIOnly(HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param)
+{
+	if (!m_open || m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_USERINTERFACE twUI;
+	twUI.ShowUI = (TW_BOOL)showUI;
+	twUI.hParent = (TW_HANDLE)parent;
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_USERINTERFACE, MSG_ENABLEDSUIONLY, (TW_MEMREF)&twUI);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	m_showUI = showUI;
+	m_parent = parent;
+	m_eventFunc = func;
+	m_eventParam = param;
+	m_enable = HGTRUE;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::Enable(HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param)
+{
+	if (!m_open || m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_USERINTERFACE twUI;
+	twUI.ShowUI = (TW_BOOL)showUI;
+	twUI.hParent = (TW_HANDLE)parent;
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_USERINTERFACE, MSG_ENABLEDS, (TW_MEMREF)&twUI);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	m_showUI = showUI;
+	m_parent = parent;
+	m_eventFunc = func;
+	m_eventParam = param;
+	m_enable = HGTRUE;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::Disable()
+{
+	if (!m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_USERINTERFACE twUI;
+	twUI.ShowUI = (TW_BOOL)m_showUI;
+	twUI.hParent = (TW_HANDLE)m_parent;
+	m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_USERINTERFACE, MSG_DISABLEDS, &twUI);
+
+	m_showUI = HGFALSE;
+	m_parent = NULL;
+	m_eventFunc = NULL;
+	m_eventParam = NULL;
+	m_enable = HGFALSE;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::ImageNativeXfer(HGUInt type, HGUInt origin, HGImage* image)
+{
+	if (!m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	if (NULL == image)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
+	TW_IMAGEINFO info;
+	if (TWRC_SUCCESS != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGEINFO, MSG_GET, (TW_MEMREF)&info))
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	HANDLE hMem = NULL;
+	if (TWRC_XFERDONE != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGENATIVEXFER, MSG_GET, &hMem))
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	HGResult ret = HGBase_CreateImageFromDIB(hMem, NULL, type, origin, image);
+	GlobalFree(hMem);
+	return ret;
+}
+
+HGResult HGTwainDSImpl::EndXfer(HGUInt* count)
+{
+	if (!m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	if (NULL == count)
+	{
+		return HGBASE_ERR_INVALIDARG;
+	}
+
+	TW_PENDINGXFERS twPend;
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_PENDINGXFERS, MSG_ENDXFER, (TW_MEMREF)&twPend);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	*count = twPend.Count;
+	return HGBASE_ERR_OK;
+}
+
+HGResult HGTwainDSImpl::Reset()
+{
+	if (!m_enable)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	TW_PENDINGXFERS twPend;
+	USHORT ret = m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_PENDINGXFERS, MSG_RESET, (TW_MEMREF)&twPend);
+	if (TWRC_SUCCESS != ret)
+	{
+		return HGBASE_ERR_FAIL;
+	}
+
+	return HGBASE_ERR_OK;
 }
\ No newline at end of file
diff --git a/modules/twain_user/HGTwainImpl.hpp b/modules/twain_user/HGTwainImpl.hpp
index 58143c3e..fcdab893 100644
--- a/modules/twain_user/HGTwainImpl.hpp
+++ b/modules/twain_user/HGTwainImpl.hpp
@@ -7,52 +7,20 @@
 #include <vector>
 #include <map>
 
-struct HGTwainDSImpl
-{
-	HGTwainDSImpl(class HGTwainDSMImpl *dsm)
-	{
-		dsmImpl = dsm;
-		memset(&ds, 0, sizeof(TW_IDENTITY));
-		open = HGFALSE;
-		showUI = HGFALSE;
-		parent = NULL;
-		enable = HGFALSE;
-	}
-
-	class HGTwainDSMImpl* dsmImpl;
-	TW_IDENTITY ds;
-	HGBool open;
-	HGBool showUI;
-	HWND parent;
-	HGBool enable;
-};
-
 class HGTwainDSMImpl
 {
+	friend class HGTwainDSImpl;
 public:
 	HGTwainDSMImpl();
 	~HGTwainDSMImpl();
 
 	HGResult LoadDSM();
 	HGResult UnloadDSM();
-	HGResult OpenDSM(HWND hwnd, HGDSEventFunc func, HGPointer param);
+	HGResult OpenDSM(HWND hwnd);
 	HGResult CloseDSM();
-
-	HGResult GetDSList(HGTwainDSImpl** ds, HGUInt* size);
-	HGResult GetDefaultDS(HGTwainDSImpl** ds);
-	HGResult SelectDS(HGTwainDSImpl** ds);
-	HGResult GetDSName(HGTwainDSImpl* ds, HGChar* name, HGUInt maxLen);
-	HGResult OpenDS(HGTwainDSImpl* ds);
-	HGResult CloseDS(HGTwainDSImpl* ds);
-	HGResult SetCapability(HGTwainDSImpl* ds, HGUInt cap, HGInt value);
-	HGResult GetCapability(HGTwainDSImpl* ds, HGUInt cap, HGInt* value);
-
-	HGResult EnableDSUIOnly(HGTwainDSImpl* ds, HGBool showUI, HWND parent);
-	HGResult EnableDS(HGTwainDSImpl* ds, HGBool showUI, HWND parent);
-	HGResult DisableDS(HGTwainDSImpl* ds);
-	HGResult ImageNativeXfer(HGTwainDSImpl* ds, HGUInt type, HGUInt origin, HGImage* image);
-	HGResult EndXfer(HGTwainDSImpl* ds, HGUInt* count);
-	HGResult Reset(HGTwainDSImpl* ds);
+	HGResult GetDSList(class HGTwainDSImpl** dsImpl, HGUInt* size);
+	HGResult GetDefaultDS(class HGTwainDSImpl** dsImpl);
+	HGResult SelectDS(class HGTwainDSImpl** dsImpl);
 
 private:
 	void GetIdentity();
@@ -65,10 +33,39 @@ private:
 	HWND m_hWnd;
 	static std::map<HWND, HGTwainDSMImpl*> m_mapWnd;
 	WNDPROC m_oldWndProc;
-	HGDSEventFunc m_dsEventFunc;
-	HGPointer m_dsEventParam;
 	HGBool m_DSMOpen;
-	std::vector<HGTwainDSImpl> m_DSList;
+	std::vector<class HGTwainDSImpl *> m_vpDSImpl;
+};
+
+class HGTwainDSImpl
+{
+	friend class HGTwainDSMImpl;
+public:
+	HGTwainDSImpl(HGTwainDSMImpl* dsmImpl, const TW_IDENTITY *iden);
+	~HGTwainDSImpl();
+
+public:
+	HGResult GetName(HGChar* name, HGUInt maxLen);
+	HGResult Open();
+	HGResult Close();
+	HGResult SetCap(HGUInt cap, HGInt value);
+	HGResult GetCap(HGUInt cap, HGInt* value);
+	HGResult EnableUIOnly(HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param);
+	HGResult Enable(HGBool showUI, HWND parent, HGDSEventFunc func, HGPointer param);
+	HGResult Disable();
+	HGResult ImageNativeXfer(HGUInt type, HGUInt origin, HGImage* image);
+	HGResult EndXfer(HGUInt* count);
+	HGResult Reset();
+
+private:
+	HGTwainDSMImpl* m_dsmImpl;
+	TW_IDENTITY m_iden;
+	HGBool m_open;
+	HGBool m_showUI;
+	HWND m_parent;
+	HGDSEventFunc m_eventFunc;
+	HGPointer m_eventParam;
+	HGBool m_enable;
 };
 
 #endif /* __HGTWAINIMPL_HPP__ */
\ No newline at end of file