TApplicationIcon (Delphi)

Description

The following code allows you to use a dialog box to redefine the icon for the application at run time. When you click Button1, OpenDialog1 executes and you specify an icon file name. The Icon is then assigned to the application. At run time, click Button1 to select the icon, then minimize the application to see the icon.

Code

procedure TForm1.Button1Click(Sender: TObject);
var 
Done: Boolean;
filenamestring : String;
begin
  OpenPictureDialog1.DefaultExt := GraphicExtension(TIcon);
  filenamestring := GraphicFileMask(TIcon);
  OpenPictureDialog1.FileName := filenamestring;
  OpenPictureDialog1.Filter := GraphicFilter(TIcon);
  OpenPictureDialog1.Options := [ ofFileMustExist, ofHideReadOnly, ofNoChangeDir ];
  Done := False;
  while not Done do
  begin
  if OpenPictureDialog1.Execute then
    begin
    if not (ofExtensionDifferent in OpenPictureDialog1.Options) then
      begin
      Application.Icon.LoadFromFile(OpenPictureDialog1.FileName);
      Done := True;
      end
    else
//      OpenPictureDialog1.Options := OpenPictureDialog1.Options - ofExtensionDifferent;
    end
  else { User cancelled }
    Done := True;
  end;
end;

Uses

• Vcl.Forms.TApplication.Icon ( fr | de | ja )
• Vcl.Dialogs.TOpenDialog.DefaultExt ( fr | de | ja )
• Vcl.Dialogs.TOpenDialog.FileName ( fr | de | ja )
• Vcl.Dialogs.TOpenDialog.Filter ( fr | de | ja )
• Vcl.Dialogs.TOpenDialog.Options ( fr | de | ja )
• Vcl.Dialogs.TOpenDialog.Execute ( fr | de | ja )
• Vcl.Graphics.GraphicFileMask ( fr | de | ja )
• Vcl.Dialogs.TOpenOptions ( fr | de | ja )