WinApi: GetParent、SetParent、MoveWindow - 获取、指定父窗口和移动窗口

提示: SetParent 应该 Windows.SetParent, 因为 TForm 的父类有同名方法.

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//声明:



{获取父窗口句柄}

GetParent(hWnd: HWND): HWND;



{指定父窗口}

SetParent(

  hWndChild: HWND;    {子句柄}

  hWndNewParent: HWND {父句柄}

): HWND;              {成功返回原父窗口句柄; 失败返回 0}



{移动窗口}

MoveWindow(

  hWnd: HWND;               {窗口句柄}

  X, Y: Integer;            {位置}

  nWidth, nHeight: Integer; {大小}

  bRepaint: BOOL            {True 表示刷新; False 表示不刷新}

): BOOL;


 
   




//举例:

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls, ExtCtrls;



type

  TForm1 = class(TForm)

    Edit1: TEdit;

    Button1: TButton;

    procedure Button1Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.Button1Click(Sender: TObject);

begin

  if GetParent(Edit1.Handle)=Handle then

  begin

    Windows.SetParent(Edit1.Handle, Button1.Handle);

    MoveWindow(Edit1.Handle, 0,0, Edit1.Width, Edit1.Height, True);

  end else begin

    Windows.SetParent(Edit1.Handle, Self.Handle);

    MoveWindow(Edit1.Handle, 0,0, Edit1.Width, Edit1.Height, True);

  end;

end;



end.


 
   




//效果图:

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