无

if( my.DoModal() == IDOK )     
{ 
CString   FileName  = my.GetPathName(); 
CString   FileExt   = my.GetFileExt(); 


if((FileExt   ==   "AVI ")   ||   (FileExt   ==   "avi "))   
{ 
CMyApp   *   pMyApp   =   (CMyApp   *)AfxGetApp(); 
CMultiDocTemplate*pAVIDocTemplate=pMyApp-> m_pAVIDocTemplate; 
pAVIDocTemplate-> OpenDocumentFile(FileName); 
} 
else   if((FileExt   ==   "BMP ")   ||   (FileExt   ==   "bmp "))   
{ 
CMyApp   *   pMyApp   =   (CMyApp   *)AfxGetApp(); 
CMultiDocTemplate*   pDATDocTemplate=pMyApp-> m_pBMPDocTemplate; 
pDATDocTemplate-> OpenDocumentFile(FileName); 
} 
else   { 
AfxMessageBox( "Yor   select   a   file   not   supported! "); 
return; 
} 
}