How to remove the title bar from a form

Question

Does anyone know how to create a Delphi form without a title bar? I have seen some some links/tips but its not exactly what I want and I couldn't do it myself.

This is what I am trying to achieve:

Answer 1

First, set BorderStyle to bsNone at design-time. Then declare the procedure CreateParams like so:

type
  TForm1 = class(TForm)
  private
  protected
    procedure CreateParams(var Params: TCreateParams); override; // ADD THIS LINE!
    { Private declarations }
  public
    { Public declarations }
  end;

and implement it like

procedure TForm1.CreateParams(var Params: TCreateParams);
begin
  inherited;
  Params.Style := Params.Style or WS_THICKFRAME;
end;