Question

Many modern applications have irregularly shaped forms. What is the best way to do this in Delphi? Is it possible to do this without using any third party VCLs?

Answer 1

yes is possible, you must use the SetWindowRgn function to set the new window region to draw.

try this code

procedure TForm1.FormCreate(Sender: TObject);
var
  region:HRGN;
begin
  region := CreateRoundRectRgn(ClientRect.left, ClientRect.top, ClientRect.right, ClientRect.bottom, 15, 15);
  SetWindowRgn(Handle, region, true);
end;

check theses links for more info

• Creating Shaped Forms (using a bitmap image)
• Is it possible to create forms with shapes other than the standard rectangular shape in Windows? (using an poligon)