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FilePos (function)
Returns the current file position of a file.
Declaration
function FilePos(var F): Longint;
Target
Windows, Real, Protected
Remarks
F is a file variable. If the current file position is at the beginning of the file, FilePos(F) returns 0. If the current file position is at the end of the file--that is, if Eof(F) is True--FilePos(F) is equal to FileSize(F).
With {$I-}, IOResult returns 0 if the operation was successful; otherwise, it returns a nonzero error code.
Restrictions
Cannot be used on a text file. File must be open.