用如下代码
type
TForm2 = class(TForm)
{ other stuff above }
procedure CreateParams(var Params: TCreateParams); override;
{ other stuff below }
end;
procedure TForm2.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
Params.Style := Params.Style and not WS_OVERLAPPEDWINDOW or WS_BORDER
end;