CFileException( int cause = CFileException::none, LONG lOsError = -1 );
cause
An enumerated type variable that indicates the reason for the exception. See CFileException::m_cause for a list of the possible values.
lOsError
An operating-system-specific reason for the exception, if available. The lOsError parameter provides more information than cause provides.
Constructs a CFileException object that stores the cause code and the operating-system code in the object.
Do not use this constructor directly, but rather call the global function AfxThrowFileException.
Note:
The variable lOsError applies only to CFile and CStdioFile objects. The CMemFile class does not handle this error code. More information specifically about the operating system is available through the run-time function _dosexterr (MS-DOS only).