?
Solved

catching "windows shutdown"

Posted on 2001-09-07
6
Medium Priority
?
196 Views
Last Modified: 2010-05-18
how do i make an application that triggers and event when a user tries to shutdown windows?
0
Comment
[X]
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
6 Comments
 
LVL 22

Expert Comment

by:Mohammed Nasman
ID: 6463396
windows send WM_QUERYENDSESSION message to the application running when it's trying to shutdown
0
 
LVL 22

Accepted Solution

by:
Mohammed Nasman earned 800 total points
ID: 6463401
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
  TForm1 = class(TForm)
  private
    { Private declarations }
    procedure WMQueryEndSession(var Msg : TWMQueryEndSession); message WM_QueryEndSession;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
procedure TForm1.WMQueryEndSession(var Msg : TWMQueryEndSession);
begin
  if MessageDlg('Close Windows ?', mtConfirmation, [mbYes,mbNo], 0) = mrNo then
    Msg.Result := 0
  else
    Msg.Result := 1;
end;


end.
0
 
LVL 2

Expert Comment

by:PeterLarsen
ID: 6463624
There are two messages you should be aware of :
   procedure wmQueryEndSession(var msg:TMessage); message WM_QUERYENDSESSION;
and
   procedure WMENDSESSION(var msg:TMessage); message WM_ENDSESSION;

Regards
Peter
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 1

Expert Comment

by:Dennis9
ID: 6463745
Try this:

procedure TMainForm.FormCreate(Sender: TObject);
begin
Application.OnMessage := AppMessage;
end;

procedure TMainForm.AppMessage(var Msg: TMsg; var Handled: Boolean);
begin
Handled := False;
if Msg.message = WM_QUERYENDSESSION then
begin
Showmessage('Windows are about to close');
end;
Handled := false;//If u set it to true it will close
end;


Dennis
0
 
LVL 3

Expert Comment

by:karouri
ID: 6468546
da best solutions in da universe have already been offered;)
0
 

Author Comment

by:dabestprogrammerindauniverse
ID: 6469402
thanks everyone!!!
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

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

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
Suggested Courses
Course of the Month9 days, 10 hours left to enroll

762 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