FUNCTION FSeek3( ptrHandle AS IntPtr, liOffset AS LONG, dwOrigin AS DWORD ) AS LONG
public static int FSeek3( IntPtr ptrHandle, int liOffset, uint dwOrigin )
|FS_RELATIVE||Current pointer position|
The low level File IO functions in the X# runtime are using .Net filestreams in the background. |
That means that the file handles returned by FOpen() and FCreate() are not 'normal' file handles, but unique identifiers that are used to find the underlying stream object in a collection of streams in the runtime.
That also means that you can't use file handles for functions such as FRead() and FWrite() that were not created in the X# runtime.
If you want to access the underlying FileStream, then you should call the function FGetStream()
FUNCTION FilePos(ptrHandle) AS LONGINT RETURN(FSeek3(ptrHandle, 0, FS_RELATIVE))