Solved

Bring window to Front

Posted on 2001-08-29
8
713 Views
Last Modified: 2010-05-18
hi
what kind of message and parameters should i send to window using SendMessage API to bring it to front or send it to back?
0
Comment
Question by:vterekh
8 Comments
 
LVL 6

Accepted Solution

by:
edey earned 30 total points
ID: 6437175
I wouldn't think you'd use a message - use setFocus instead.

//Bring the current form to the front
setFocus;

//Bring some other form to the front
windows.setFocus(some_windows_handle);

GL
Mike
0
 
LVL 3

Expert Comment

by:Slavak
ID: 6437199
You can use SetWindowPos API function
0
 
LVL 2

Expert Comment

by:Tasomia
ID: 6438399
I use this function:

function ForceForegroundWindow(hwnd: THandle): boolean;
const
  SPI_GETFOREGROUNDLOCKTIMEOUT = $2000;
  SPI_SETFOREGROUNDLOCKTIMEOUT = $2001;
var
  ForegroundThreadID: DWORD;
  ThisThreadID      : DWORD;
  timeout           : DWORD;
begin
  if IsIconic(hwnd) then ShowWindow(hwnd, SW_RESTORE);

  if GetForegroundWindow = hwnd then Result := true
  else begin

    // Windows 98/2000 doesn't want to foreground a window when some other
    // window has keyboard focus
 
    if ((Win32Platform = VER_PLATFORM_WIN32_NT) and (Win32MajorVersion > 4)) or
      ((Win32Platform = VER_PLATFORM_WIN32_WINDOWS) and
      ((Win32MajorVersion > 4) or ((Win32MajorVersion = 4) and (Win32MinorVersion > 0)))) then
    begin

      // Code from Karl E. Peterson, www.mvps.org/vb/sample.htm
      // Converted to Delphi by Ray Lischner
      // Published in The Delphi Magazine 55, page 16
 
      Result := false;
      ForegroundThreadID := GetWindowThreadProcessID(GetForegroundWindow,nil);
      ThisThreadID := GetWindowThreadPRocessId(hwnd,nil);
      if AttachThreadInput(ThisThreadID, ForegroundThreadID, true) then begin
        BringWindowToTop(hwnd); //IE 5.5 related hack
        SetForegroundWindow(hwnd);
        AttachThreadInput(ThisThreadID, ForegroundThreadID, false);
        Result := (GetForegroundWindow = hwnd);
      end;
      if not Result then begin

        // Code by Daniel P. Stasinski <dannys@karemor.com>

        SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT, 0, @timeout, 0);
        SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, TObject(0), SPIF_SENDCHANGE);
        BringWindowToTop(hwnd); //IE 5.5 related hack
        SetForegroundWindow(hWnd);
        SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, TObject(timeout), SPIF_SENDCHANGE);
      end;
    end
    else begin
      BringWindowToTop(hwnd); //IE 5.5 related hack        
      SetForegroundWindow(hwnd);
    end;
     
    Result := (GetForegroundWindow = hwnd);
  end;
end; { ForceForegroundWindow }
0
Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

 
LVL 3

Expert Comment

by:VSF
ID: 6438499
If you are talking about bringing MDI Child forms to Front you should try:

MyForm.bringtofront;

Hope this helps!

VSF
www.victory.hpg.com.br
0
 
LVL 4

Expert Comment

by:YodaMage
ID: 6438651
ActiveControl := TForm; (I hate set focus...too many problems in the past trying to set focus before changing visible or enabled properties)

TForm.Show; should also work.
0
 
LVL 1

Author Comment

by:vterekh
ID: 6439345
Thanks All.

edey's answer is more appropriated for my purposes.
0
 
LVL 6

Expert Comment

by:edey
ID: 6440538
Glad to be of service :)

GL
Mike
0
 
LVL 1

Author Comment

by:vterekh
ID: 6440573
to edey

Mike
By the way I've found that BringWindowToTop function exists declared in windows unit too :))
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

860 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