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Get window icon

Posted on 2001-07-08
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Last Modified: 2010-04-06
How to get window icon if I have its handle?
thanks
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Question by:duke_n
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8 Comments
 
LVL 9

Accepted Solution

by:
ITugay earned 400 total points
ID: 6262234
Hi duke_n,

here is it:

procedure TForm1.SpeedButton1Click(Sender: TObject);
var
  H: HIcon;
begin
  H := SendMessage(Handle, WM_GETICON, ICON_BIG, 0);
  DrawIcon(Canvas.Handle, 30, 30, H);

  H := SendMessage(Handle, WM_GETICON, ICON_SMALL, 0);
  DrawIcon(Canvas.Handle, 50, 30, H);
end;

-----
Igor
0
 
LVL 2

Expert Comment

by:Tasomia
ID: 6262247
Hi Igor,
I don't know why, but your code doesn't work for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H : HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := SendMessage(hwindow, WM_GETICON, ICON_BIG, 0);
 {or ICON_SMALL}
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

But this code works for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H: HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := CopyIcon(GetClassLong(hwindow, GCL_HICON ));
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

tas
0
 
LVL 2

Expert Comment

by:Tasomia
ID: 6262253
Hi Igor,
I don't know why, but your code doesn't work for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H : HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := SendMessage(hwindow, WM_GETICON, ICON_BIG, 0);
 {or ICON_SMALL}
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

But this code works for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H: HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := CopyIcon(GetClassLong(hwindow, GCL_HICON ));
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

tas
0
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LVL 2

Expert Comment

by:Tasomia
ID: 6262262
Hi Igor,
I don't know why, but your code doesn't work for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H : HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := SendMessage(hwindow, WM_GETICON, ICON_BIG, 0);
 {or ICON_SMALL}
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

But this code works for me:

procedure TForm1.Button1Click(Sender: TObject);
var
 hwindow : THandle;
 H: HIcon;
begin
 hwindow := FindWindow('notepad',nil);
 H := CopyIcon(GetClassLong(hwindow, GCL_HICON ));
 DrawIcon(Canvas.Handle, 30, 30, H);
end;

tas
0
 
LVL 9

Expert Comment

by:ITugay
ID: 6262272
hi tas,

CopyIcon works for different modules while SendMessage(...WM_GETICON...) for current.

----
Igor.
0
 
LVL 1

Author Comment

by:duke_n
ID: 6262332
Wow, emailbomb :))
Wait a sec.

I need to get icons of all programs' icons, not only mine(I can do that one with Form.Icon easier)
0
 
LVL 1

Author Comment

by:duke_n
ID: 6262341
nope, I don't know what the fuss is all about.
ITUgay's function works fine on all the processes.

although there isn't always a small icon, but that can be handled.

lemme check the second suggestion
0
 
LVL 1

Author Comment

by:duke_n
ID: 6262352
the second suggestion always seems to get the small icon.
But ITugay was first and the points are his.
0

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