MFC添加一个按钮，实现浏览功能

CString CTestDlg::brow(LPCTSTR filter) 
{
	OPENFILENAME ofn;
	TCHAR szFilename[512]=_T("");

	ZeroMemory(&ofn, sizeof(OPENFILENAME));
	ofn.lStructSize = sizeof(OPENFILENAME);
	ofn.hwndOwner = ::AfxGetMainWnd()->m_hWnd;
	ofn.lpstrFile = szFilename;
	ofn.nMaxFile = sizeof(szFilename);
	ofn.lpstrFilter = filter ;
	ofn.nFilterIndex = 1;
	ofn.lpstrFileTitle = NULL;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = NULL;
	ofn.lpstrDefExt=NULL;
	ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
	GetOpenFileName(&ofn);
	if(lstrlen(ofn.lpstrFile)>0)
	{
		return ofn.lpstrFile;

	}
	return _T("");
}

void CTestDlg::OnClickedButton1()
{
	// TODO: 在此添加控件通知处理程序代码
	UpdateData(TRUE);
	m_File=brow(_T("所有文件(*.*)|*.*\0\0"));
	UpdateData(false);
}

在TestDlg.h添加如下代码：

CString brow(LPCTSTR filter) ;