?
Solved

Detecting if form minimized

Posted on 1997-06-24
3
Medium Priority
?
306 Views
Last Modified: 2010-04-03
Can anyone tell me how to detect if a form is minimized?  I cannot find any info on this at all.

Ok.  I already had a procedure OnResize, but when the minimize button is pressed, the program does not even trace to this procedure.

I know the OnResize procedure is working, because if the window is moved, this procedure is called perfectly.

I need to know if there is an API which detects when the minimize button is pressed.

Any help would be appreciated.

Stuart
0
Comment
Question by:Stuart_Johnson
[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
  • 2
3 Comments
 
LVL 1

Accepted Solution

by:
CFantin earned 200 total points
ID: 1337743
You can Check the if the WindowState property is wsMinimized.
This property is updated when you form state is changed.
Therefore you can check if the form is Maximized or normal as well with the wsMaximized and wsNormal.

Hope this helps
0
 
LVL 6

Author Comment

by:Stuart_Johnson
ID: 1337744
Edited text of question
0
 
LVL 1

Expert Comment

by:CFantin
ID: 1337745
Here is a bit of code to detect the Minimize, Maximize and restore of a form.

The windows message WM_SYSCOMMAND is captured as well as creating
a message handler for the application.
The message handler for the form needs to be there because when the user right clicks the application button in 95 the windows message for the form is not created but instead the windows message is sent to the application.

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  WINTYPES, WINPROCS, StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
  private
    procedure WMSIZE(var Msg: TMessage); message WM_SYSCOMMAND;
    procedure MyMessage(var Msg: TMSG; var Handled: Boolean);
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.WMSIZE(var Msg: TMessage);
begin
  inherited;

  case Msg.WParam of
    SC_MINIMIZE: ShowMessage('Minimize');
    SC_MAXIMIZE: ShowMessage('Maximize');
    SC_RESTORE: ShowMessage('Restore');
  end;
end;

procedure TForm1.MyMessage(var Msg: TMsg; var Handled: Boolean);
begin
  if (Msg.Message = WM_SYSCOMMAND) then
  begin
    case Msg.wParam of
      SC_MINIMIZE: ShowMessage('Minimize');
      SC_MAXIMIZE: ShowMessage('Maximize');
      SC_RESTORE: ShowMessage('Restore');
    end;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnMessage := MyMessage;
end;

end.

Try this out...

Good luck
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

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 I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…
Suggested Courses
Course of the Month10 days, 15 hours left to enroll

770 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