diff --git a/HuaGoCorrect/HuaGoCorrectDlg.cpp b/HuaGoCorrect/HuaGoCorrectDlg.cpp
index 0174f55..49ab0dc 100644
--- a/HuaGoCorrect/HuaGoCorrectDlg.cpp
+++ b/HuaGoCorrect/HuaGoCorrectDlg.cpp
@@ -195,7 +195,7 @@ BOOL CHuaGoCorrectDlg::OnInitDialog()
 	s_minute = "00";
 	s_second = "00";
 	UpdateData(FALSE);
-
+	((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)))->SetLimitText(0xffffffff);
 	bool ret = RefreshUSBList();
 	if (ret)
 	{
@@ -424,13 +424,16 @@ void CHuaGoCorrectDlg::OnBnClickedBtnFlat()
 			USES_CONVERSION;
 			std::string c_str = StringToUtf(info);
 			CString pWideChar = A2T(c_str.c_str());
-			CString oldinfo;
-			UpdateData(FALSE);
-			((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)))->GetWindowText(oldinfo);
-			oldinfo += pWideChar;
-			((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)))->SetWindowText(oldinfo);
+			//CString oldinfo;
+			//UpdateData(FALSE);
+			//((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)))->GetWindowText(oldinfo);
+			//oldinfo += pWideChar;
+			//((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)))->SetWindowText(oldinfo);
 			auto edit = ((CEdit*)(m_A3dlg.GetDlgItem(IDC_LSTFLATINFO)));
-			edit->LineScroll(edit->GetLineCount());
+			assert(edit && edit->GetSafeHwnd());
+			edit->SetSel(edit->GetWindowTextLengthW(), edit->GetWindowTextLengthW());
+			edit->ReplaceSel(pWideChar);
+			//edit->LineScroll(edit->GetLineCount());
 		};
 		m_drv->SetFlatCallback(flatcall);
 		m_drv->StartFlat(((CButton*)GetDlgItem(IDC_CKBCORRECTMODE))->GetCheck());