调用DLL开启线程的问题

 错误的编写方式：（注意用感叹号夹起来的两行）在 ::FreeLibrary(hPro);这一行代码执行之后，dll里面的分配的内存空间就会全部被释放掉，所以会报“帧不在模块之中”，“内存访问错误”之类的错误。

void CMFCApplication2Dlg::OnBnClickedOk()
{
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	HINSTANCE hPro = ::LoadLibrary("MFCLibrary1.dll");//加载一个自己写的DLL，提供了一
                                                      //getCFindFile用于获取一个类指
                                                      //针；    
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!    
	if (hPro == NULL)
	{
		return ;
	}
	else
	{
		typedef MyCFindFile* (*MENU_EXECUTE)();
		MENU_EXECUTE getCFindFile = NULL;
		getCFindFile = (MENU_EXECUTE)::GetProcAddress(hPro, "getCFindFile");//MenuExecute 函数名字
		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();//把当前主对话框的窗口句柄传过去，这样就可以在线程函数中使用 
			//m_ResultList.DeleteAllItems();//清空上一次执行完之后的信息
			//std::string strStr;
			//strStr = pItem->m_PathFind.GetBuffer(0);
			//funcFindFile(strStr, pItem->m_hMainDlg);
		}
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      ::FreeLibrary(hPro);
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

	}
	return;	
}

正确的写法：

1，将HINSTANCE hPro;添加到类成员变量之中

2，将FreeLibrary（hPro）；函数放到MFC退出按钮里面，反正要保证在使用完hpro之前不要释放掉，也可以直接用静态加载