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Screenshot of desktop

Posted on 1998-12-11
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Medium Priority
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Last Modified: 2010-04-04
i'll create a screenshot of the windows desktop.
i tried following code, but it's very slow.

 dc:=getdc($0000);
 for y := 0 to image1.picture.Bitmap.Height-1 do begin
  for x := 0 to image1.picture.Bitmap.Width-1 do
             image1.Canvas.Pixels[x,y]:=getpixel(dc,x,y);
  end;

{Bitmap.Height =1024
Bitmap.Width=768}

any idea how to make it faster
0
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Question by:bqui
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5 Comments
 
LVL 44

Accepted Solution

by:
bruintje earned 80 total points
ID: 1350696
Hi bqui,

Try this

a form, a button, and a image,

procedure TForm1.Button1Click(Sender: TObject);
var
  DeskTop: TCanvas;
begin
  DeskTop := TCanvas.Create;
  try
    with DeskTop do Handle := GetWindowDC(GetDesktopWindow);
    Image1.BoundsRect := Desktop.ClipRect;
    with Image1.Canvas do
      CopyRect(Image1.BoundsRect, DeskTop, DeskTop.ClipRect)
  finally
    DeskTop.Free
  end;
end;

Good luck
Bruintje

0
 

Author Comment

by:bqui
ID: 1350697
i'll accept your answer,
but can you tell me first, why the screenshot is streched?
if not - ok -, anyway i'll give you the points
0
 
LVL 44

Expert Comment

by:bruintje
ID: 1350698
Because you get a copy of the whole desktop window and so things like the the toolbars will get in the way of showing the whole desktop.

But you can prevent this and use the properties of the Desktop.cliprect (left, right etc) to solve this, by halving them and then assigning them to the (left, right etc) properties of Image1.

Hope this helps
Bruintje.

0
 

Author Comment

by:bqui
ID: 1350699
thank you
0
 
LVL 44

Expert Comment

by:bruintje
ID: 1350700
my pleasure....
br(UINT)je.
0

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