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Minimze and close the application by simple rolling your mouse over the applications system buttons

Title: Minimze and close the application by simple rolling your mouse over the applications system buttons Question: Problem? How can I minimize Close the application by rolling my mouse over the system controls Answer: unit Unit1; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); procedure FormCreate(Sender: TObject); private procedure lik(var Msg:TWMNCHITTEST);message WM_NCHITTEST; public { Public declarations } end; var Form1: TForm1; tx:Boolean; implementation {$R *.DFM} procedure TForm1.lik(var Msg:TWMNCHITTEST); begin inherited;//respond to other commands if tx=true then //check if it's enabled begin if Msg.Result=Windows.HTMINBUTTON then Application.Minimize else if Msg.Result=Windows.HTCLOSE then Close;//make widows to do it end; end; procedure TForm1.Button1Click(Sender: TObject); begin tx:=True;//This enables the function end; procedure TForm1.FormCreate(Sender: TObject); begin tx:=False;//This disables it end; end.