Alterando o papel de parede 2

Procedure ChangeWallpaper(bitmap: string);
var
pBitmap : pchar;
begin
bitmap:=bitmap+#0; {bitmap contém um arquivo *.bmp}
pBitmap:=@bitmap[1];
SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, pBitmap, SPIF_UPDATEINIFILE);
end;