AlwaysOnTop form and hook

Posted on 2007-04-11
Medium Priority
Last Modified: 2010-04-05

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...


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


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

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!
Question by:rogerrr
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Accepted Solution

xr1140 earned 500 total points
ID: 18893669

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

Assisted Solution

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.

Expert Comment

ID: 21156552
Forced accept.

EE Admin

Featured Post

Enroll in August's Course of the Month

August's CompTIA IT Fundamentals course includes 19 hours of basic computer principle modules and prepares you for the certification exam. It's free for Premium Members, Team Accounts, and Qualified Experts!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
Suggested Courses
Course of the Month12 days, 19 hours left to enroll

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question