FUNCTION FReadText3( ptrHandle AS IntPtr, ptrBufferVar AS BYTE, dwBytes AS DWORD ) AS DWORD
public static uint FReadText3( IntPtr ptrHandle, byte ptrBufferVar, uint dwBytes )
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()
DEFINE F_BLOCK := 128 Function Start() LOCAL cBuffer AS PTR cBuffer := MemAlloc(F_BLOCK) IF cBuffer = NULL PTR RETURN FALSE ENDIF ptrHandle := FOpen("temp.txt") IF ptrHandle = F_ERROR ? DOSErrString(FError()) RETURN FALSE ELSE IF FReadText3(ptrHandle, cBuffer, F_BLOCK) <> F_BLOCK ? DOSErrString(FError()) RETURN FALSE ENDIF FClose(ptrHandle) ENDIF MemFree(cBuffer) RETURN TRUE