Calling DLL to start thread

  Wrong way to write ：（ Pay attention to the two lines clipped with exclamation marks ） stay  ::FreeLibrary(hPro); After this line of code is executed ,dll The allocated memory space inside will be released , So I will report “ Frame not in module ”,“ Memory access error ” Or something like that .

void CMFCApplication2Dlg::OnBnClickedOk()
{
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	HINSTANCE hPro = ::LoadLibrary("MFCLibrary1.dll");// Load a self written DLL, One... Is provided 
                                                      //getCFindFile Used to get a class finger 
                                                      // The needle ;    
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!    
	if (hPro == NULL)
	{
		return ;
	}
	else
	{
		typedef MyCFindFile* (*MENU_EXECUTE)();
		MENU_EXECUTE getCFindFile = NULL;
		getCFindFile = (MENU_EXECUTE)::GetProcAddress(hPro, "getCFindFile");//MenuExecute  Function name 
		if (getCFindFile)
		{
			MyCFindFile * pItem = getCFindFile();
			CString s;
			GetDlgItemText(IDC_EDIT4,s);
			s.Format(_T("%s"), s);
			std::string strStr;
			strStr = s.GetBuffer(0);
			HWND hdlg = GetSafeHwnd();
			pItem->funcFindFile(strStr, hdlg, 2);
			//pItem->m_hMainDlg = GetSafeHwnd();// Pass the window handle of the current main dialog box , In this way, you can use  
			//m_ResultList.DeleteAllItems();// Clear the information after the last execution 
			//std::string strStr;
			//strStr = pItem->m_PathFind.GetBuffer(0);
			//funcFindFile(strStr, pItem->m_hMainDlg);
		}
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      ::FreeLibrary(hPro);
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

	}
	return;	
}

Correct writing ：

1, take HINSTANCE hPro; Add to class member variables

2, take FreeLibrary（hPro）; The function is placed in MFC Inside the exit button , Anyway, make sure you finish using hpro Don't release it before , You can also directly use static loading