SafeArrayAccessData und pointer

[EWeiss]

Kann mir jemand sagen ob der cast für SafeArrayAccessData so in Ordnung ist?

Delphi-Quellcode:

procedure TAtmoCtrlLib.AtmoCreateTransferBuffers(FourCC, bytePerPixel, width,
  height: Integer);
var
  size: Integer;
  header: BITMAPINFOHEADER;
  pHeader: Pointer;

begin
  if Assigned(PpixelDataArr) then
    SafeArrayDestroy(PpixelDataArr);

  if Assigned(PbitmapInfoArr) then
    SafeArrayDestroy(PbitmapInfoArr);

    size := width * height * bytePerPixel;
    PpixelDataArr  := SafeArrayCreateVector(VT_UI1, 0, size);

    PbitmapInfoArr := SafeArrayCreateVector(VT_UI1, 0, sizeof(BITMAPINFOHEADER));

    pHeader := @Header;

    SafeArrayAccessData(PbitmapInfoArr, pHeader);
    Header.biSize := sizeof(BITMAPINFOHEADER);
    Header.biWidth := width;
    Header.biHeight := height;
    Header.biBitCount := bytePerPixel*8;
    Header.biCompression := FourCC;
    SafeArrayUnaccessData(PbitmapInfoArr);
end;

Dieser hier > pHeader := @Header;

gruss