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AlwaysOnTop form and hook

Posted on 2007-04-11
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Last Modified: 2010-04-05
Hello!

I have a problem, but i didn't find any solution on the Internet.
The problem is the following. I have a stayontop window (created by me) and i want to keep it
always on top over other desktop windows but !!! not over popup menus (like right click context menus), file menus (e.g. File-Edit-Settings...), and dropdown lists. If a window is created with WS_POPUP or WS_POPUPWINDOW style flag then my window can't stay on top. I tried to use a hook but wont work...because i don't know how can i draw a distinction between a real popup window and a standard window created with WS_POPUP or WS_POPUPWINDOW flag...


if PCWP^.Message = WM_WINDOWPOSCHANGING or WM_WINDOWPOSCHANGED then
begin

//stayontopform is my window
if PCWP^.hwnd<>FindWindow(nil,'stayontopform') then
  begin
      if (GetWindowLong(PCWP.hwnd, GWL_EXSTYLE) and WS_EX_TOPMOST) <> 0 then
      begin
      Style:=GetWindowLong(PCWP^.hwnd, GWL_STYLE);

      //if not WS_POPUP
      if ((Style and WS_POPUP or WS_POPUPWINDOW or WS_SYSMENU)=0) then
      SetWindowPos(PCWP^.hwnd,HWND_NOTOPMOST,0,0,0,0,SWP_NOSIZE + SWP_NOMOVE);

      //if has menu
      if ((HMenu(GetMenu(PCWP^.hwnd))<>0) and (SendMessage(PCWP^.hwnd,LB_SETCOUNT,0,0)=0)) then
      SetWindowPos(PCWP^.hwnd,HWND_NOTOPMOST,0,0,0,0,SWP_NOSIZE + SWP_NOMOVE);

      //if has system menu
      if (HMenu(GetSystemMenu(PCWP^.hwnd,false))<>0) then
      SetWindowPos(PCWP^.hwnd,HWND_NOTOPMOST,0,0,0,0,SWP_NOSIZE + SWP_NOMOVE);

      //if has captionbar
      if ((Style and WS_CAPTION)=WS_CAPTION) then
      SetWindowPos(PCWP^.hwnd,HWND_NOTOPMOST,0,0,0,0,SWP_NOSIZE + SWP_NOMOVE);

     end;
  end;
end;

    Result:=CallNextHookEx(MyHook, pCode, pHandle, pWindow);
end;



Is there any difference between these windows? For example a system message that's applicable for a
real popup (right click menus, file menus, dropdown lists) and not for a standard desktop window?
(or vice versa)

Thanks in advance!
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Question by:rogerrr
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4 Comments
 
LVL 5

Accepted Solution

by:
xr1140 earned 500 total points
ID: 18893669

maybe i haven`t understood your problem but .... by default popup menus are drawn over onTop windows
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LVL 16

Assisted Solution

by:CodedK
CodedK earned 500 total points
ID: 18897938
I have a problem like that with a custom ontop form.
I've noticed the following :

In my form i have a pop up menu.
When i pop up my form menu and close it...
Then EVERY other pop up menu sit above my form without a problem !

So if you don't find something to work with just fire up a Pop-up menu once, when the form loads.
Hope this will help.
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Expert Comment

by:Computer101
ID: 21156552
Forced accept.

Computer101
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