怎样在VC中实现带预览功能的打开对话框

[suxinjk]

我想在VC中实现带预览功能的对话框，不知如何实现，请高手指点？

[Smile_Tiger]

从CFileDialog派生自己的对话框

[wdh]

在 vc技术内幕第4版 中有例子

[zheng_rui]

如下:

CFileDialog fileDlg(TRUE);

fileDlg.m_ofn.Flags and =OFN_EXPLORER and OFN_ENABLETEMPLATE and OFN_ENABLEHOOK;
fileDlg.m_ofn.lpstrTitle="File to load";
fileDlg.m_ofn.hInstance = AfxGetInstanceHandle();
fileDlg.m_ofn.lpTemplateName = MAKEINTRESOURCE(IDD_HOOK);
fileDlg.m_ofn.lpfnHook = (LPOFNHOOKPROC)previewProc;
fileDlg.m_ofn.lpstrFilter = "JPG File (*.JPG)\0*.JPG\0BMP (*.BMP)\0*.BMP\0All files (*.*)\0*.jpg;*.bmp\0\0";

if (fileDlg.DoModal()==IDOK)
{


}


// previewProc 即hookproc 如下:

UINT CALLBACK previewProc( HWND hdlg, UINT message, WPARAM wParam, LPARAM lParam )
{
OFNOTIFY *info;
char filename[MAX_PATH];

if(message == WM_INITDIALOG)
{
SetWindowText(hdlg,"Hook Preview Dlg");
return TRUE;
}
else if(message == WM_NOTIFY )
{


info = (OFNOTIFY*)lParam;
if(info->hdr.code == CDN_SELCHANGE)
{
WIN32_FIND_DATA ffd;
CommDlg_OpenSave_GetFilePath(info->hdr.hwndFrom,filename,MAX_PATH);
if(INVALID_HANDLE_VALUE == FindFirstFile(filename,&ffd))
return 0;
if(ffd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)
return 0;

//draw it

}
}
else if(message == WM_COMMAND)
{
if(LOWORD(wParam)==IDC_TOGGLE)
{
}
}
return 0;
}

[suxinjk]

谢谢各位