Hiding applications

How to hide a Delphi application.

program Project1;



uses

  Forms,

  Unit1 in 'Unit1.pas' {Form1},

  Windows;



{$R *.RES}



//Declare a var to retrieve current window information

var

  ExtendedStyle : Integer;



begin

  Application.Initialize;



  //Get the Extended Styles of the Application, by passing its

  //handle to GetWindowLong

  ExtendedStyle := GetWindowLong(Application.Handle, GWL_EXSTYLE);



  //Now, set the Extended Style by doing a bit masking operation.

  //OR in the WS_EX_TOOLWINDOW bit, and AND out the WS_EXAPPWINDOW bit

  //This effectively converts the application from an App Windows to a

  //Tool Window.

  SetWindowLong(Application.Handle, GWL_EXSTYLE, ExtendedStyle OR WS_EX_TOOLWINDOW



                                                 AND NOT WS_EX_APPWINDOW);

  Application.CreateForm(TForm1, Form1);

  Application.Run;

end.

 

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