GetFileExt() ;

I need name Extension (GetFileExt()) after save file by use CommonDiag save for write program.
Please answer me urgent.
Thank you very much.

CFileDialog fDlg(TRUE);
fDlg.m_ofn.Flags |= OFN_ALLOWMULTISELECT;
fDlg.DoModal();
CString strFile= fDlg.GetFileExt( );
POSITION pos=fDlg.GetStartPosition( );
while(pos!=NULL)
CString strFn=fDlg.GetNextPathName(pos);