Delphi实现无标题有边框的窗体

1.在delphi中新建窗体程序，然后设置窗口的

BorderStyle属性为bsNone

2.在窗体的public区写下这一句： 

Procedure CreateParams(var Params :TCreateParams);override;

 

3.然后把光标停在这一行上，按下Ctrl＋Shift＋C，在出现的代码块里写上

      inherited  CreateParams(Params);
      if    BorderStyle    =    bsNone    then
      with    Params    do
           Style := Style or WS_THICKFRAME;

Delphi中函数的覆盖记得在函数声明后面要加上关键字override;

完整代码：

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
    (*在public中加上这句*)
    Procedure CreateParams(var Params :TCreateParams);override;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

{*当窗口是无边框无标题的时候 显示边框   让窗体可拉伸*}
procedure TForm1.CreateParams(var Params: TCreateParams);
begin
  inherited;
  inherited  CreateParams(Params);
      if    BorderStyle    =    bsNone    then
      with    Params    do
           Style := Style or WS_THICKFRAME;
end;

end.