Mega Code Archive
Create a round form
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Title: Create a round form
Question: How can I make a transparent or solid round form, without caption and border?
Answer:
{ This is a complete example of how to make a round form;
Do not forget to create a TButton to close the window }
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls,
Forms, Dialogs, ExtCtrls, Buttons, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private-Deklarationen}
procedure CreateParams(var Params: TCreateParams); override;
public
{ Public-Deklarationen}
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
{ TForm1 }
procedure TForm1.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
{Remove caption and border}
Params.Style := Params.Style or ws_popup xor ws_dlgframe;
end;
procedure TForm1.FormCreate(Sender: TObject);
var
FormRgn: hRgn;
begin
{clear form}
Form1.Brush.Style := bsSolid; //bsclear;
{make form round}
GetWindowRgn(Form1.Handle, FormRgn);
{ delete the old object }
DeleteObject(FormRgn);
{ make the form rectangular }
Form1.Height := 500;
Form1.Width := Form1.Height;
{ create the round form }
FormRgn := CreateRoundRectRgn(1, 1, Form1.Width - 1,
Form1.height - 1, Form1.width, Form1.height);
{ set the new round window }
SetWindowRgn(Form1.Handle, FormRgn, TRUE);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Form1.close;
end;
end.
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