CFile::hFileNull

Determines the presence of a valid file handle for the CFile object.

static AFX_DATA const HANDLE hFileNull;

Заметки

This constant is used to determine if the CFile object has a valid file handle.

The following example demonstrates this operation:

if (myFile.m_hFile != CFile::hFileNull)
   ;//perform operations on the file
else
   ;//indicate the presence of an invalid handle

Header: afx.h