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Posted on 2000-05-14
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Last Modified: 2010-04-04
How to detect the handle of a window that the mouse is hovering over?
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Question by:duke_n
  • 3
  • 3
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10 Comments
 
LVL 17

Expert Comment

by:inthe
ID: 2809658
hi,
to get the handle and classname of control/window under mouse you can use :

var
classname: array[0..254] of char;
h : hwnd;
begin
h := WindowFromPoint(TControl(Sender).ClientToScreen(Point(X, Y)));
GetClassName(h, classname, 254);

Regards Barry

0
 
LVL 1

Author Comment

by:duke_n
ID: 2811156
That's nice.

But I need it to give me the window handle even If I'm pointing on a button in that window.
0
 
LVL 17

Expert Comment

by:inthe
ID: 2811746
well you could put something like this on a timer(set to 100)

procedure TForm1.Timer1Timer(Sender: TObject);
var
mp,i1,i2: integer;
p: tpoint;
h : hwnd;
begin
 mp:=getmessagepos();
  i1:=hiword(mp);
  i2:=loword(mp);
    p.y:=i1;
    p.x:=i2;
   h:=windowfrompoint(p);
  edit1.text :=
'mouse is over handle ' +inttostr(h);
end;
0
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LVL 5

Expert Comment

by:Gwena
ID: 2811831
listening
0
 
LVL 5

Expert Comment

by:Gwena
ID: 2811835
listening
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 2813339
hi all,

what about

var
  P : TPoint;
  H : THandle;
begin
  GetCursorpos(P);      //Get MousePos
  H := WindowFromPoint(P); //Get WindowHandle
end;

meikl
0
 
LVL 1

Author Comment

by:duke_n
ID: 2813993
Barry, your [second] solution is kinda strange.
It detects mouse position change from control to control on my app window, yet doesn't always detect mouse pos change from WINDOW to WINDOW.

And Meikl, your solution looks a whole lot like barry's first one. And I repeat what I didn't like there: it detects mouse pos change from control to control(windowed controls in the same "big" window).
0
 
LVL 20

Accepted Solution

by:
Madshi earned 400 total points
ID: 2814018
H := WindowFromPoint(P);
while GetParent(H) <> 0 do
  H := GetParent(H);

Regards, Madshi.
0
 
LVL 17

Expert Comment

by:inthe
ID: 2814978
oh i misunderstood duke_n's comment.
you want no matter what control the cursor is over it tells you the window handle.
{i thought you wanted to know the handle of whatever control the cursor was over..}
my mistake.
madshis last commment should sort it out .
cheers Barry
0
 
LVL 1

Author Comment

by:duke_n
ID: 2817506
Okey-Dokey.
Thanx.
0

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