?
Solved

HOW TO KNOW WHEN THE USER CHANGE THE WALLPAPER

Posted on 2006-07-02
2
Medium Priority
?
244 Views
Last Modified: 2010-04-05
I WOULD LIKE TO KNOW WHEN THE USER CHANGE THE WALLPAPER, AFTER THAT:

SHOW MESSAGE TO HIM THAT SAYS LIKE " YOU CAN NOT CHANGE THE WALL PAPERT"

AND FINALLY, CHANGE TO MY OWN WALLPAPER.
0
Comment
Question by:rafaelrgl
2 Comments
 
LVL 3

Accepted Solution

by:
Ubethatway earned 2000 total points
ID: 17028643
To disable the user from being able to change the wallpaper you need to use the registry. See this article for instructions:

http://delphi.about.com/od/windowsshellapi/l/aa081703a.htm

Alternatively, if you dont want to disable that page entirely, you will need to monitor the registry, note when the wallpaoper is changed, display that message, then revert to the old wallpaper.

This article shows you how to change the wallpaper from delphi:

http://delphi.about.com/od/windowsshellapi/a/tregistry.htm

QUOTE:

uses registry;
procedure TForm1.FormCreate(Sender: TObject) ;
var
   reg:TRegistry;
begin
   reg:=TRegistry.Create;
   with reg do begin
    try
     if OpenKey('\Control Panel\desktop', False) then begin
     //change wallpaper and tile it
      reg.WriteString ('Wallpaper','c:\windows\CIRCLES.bmp') ;
      //update changes immediately
      SystemParametersInfo (SPI_SETDESKWALLPAPER,0, nil,SPIF_SENDWININICHANGE) ;
     end
    finally
      reg.Free;
    end;
   end;
end;

Simply replace 'c:\windows\CIRCLES.bmp' with the file you wish to use as wallpaper.

For help on monitoring the registry see this article:

http://delphi.about.com/od/kbwinshell/l/aa052003a.htm

The registry key you will need to monitor is: \Control Panel\desktop\Wallpaper

Hope that helps, Mark
0
 
LVL 17

Expert Comment

by:TheRealLoki
ID: 17028685
private
    { Private declarations }
    procedure WM_SETTINGCHANGE(var Message:TMessage); message WM_SETTINGCHANGE;

procedure TForm1.WM_SETTINGCHANGE(var Message:TMessage);
begin
  if (message.WParam = SPI_SETDESKWALLPAPER)
    or (message.Msg = SPI_SETDESKWALLPAPER)  then //wallpaper changed
end;
0

Featured Post

Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

Question has a verified solution.

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

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…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
This Micro Tutorial will teach you how to add a cinematic look to any film or video out there. There are very few simple steps that you will follow to do so. This will be demonstrated using Adobe Premiere Pro CS6.
Screencast - Getting to Know the Pipeline
Suggested Courses
Course of the Month17 days, 5 hours left to enroll

864 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