delphi 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.

//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.

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