program GetScrnJpg;
uses
Windows, Graphics, jpeg;
{$R *.RES}
var
B: TBitmap;
S: string;
begin
B := TBitmap.Create;
B.Width := GetSystemMetrics(SM_CXSCREEN); {Screen.Width}
B.Height := GetSystemMetrics(SM_CYSCREEN); {Screen.Height}
BitBlt(B.Canvas.handle, 0, 0, B.Width, B.Height, GetDc(0), 0, 0, SRCCOPY);
if ParamStr(1) <> '' then
S := ParamStr(1) + '.jpg'
else
S := 'Screen.jpg';
with TJPEGImage.Create do
begin
Assign(B);
CompressionQuality := 75;
SaveToFile(S);
free;
end;
B.Free;
end.