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MgErr FRefNumToFD(refNum, fdp);

Purpose

Gets the file descriptor associated with the specified file refnum.

If no error occurs, the resulting file descriptor is stored in the address referred to by fdp. If an error occurs, NULL is stored in the address referred to by fdp, and the error is returned.

Parameters

Name	Type	Description
refNum	LVRefNum	The file refnum whose associated file descriptor you want to get.
fdp	File *	Address at which FRefNumToFD stores the file descriptor associated with the specified file refnum. This parameter is a pointer.

Return Value

MgErr, which can contain the following errors. If you receive errors from CIN functions, most error names correspond to LabVIEW error codes.

Value	Corresponding Error Code or Description
noErr	No error.
mgArgErr	1