delphi取鼠标所指窗体信息

取得了鼠标所指控件与其父窗体的信息。

源程序代码：
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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
   Memo1: TMemo;
   procedure FormCreate(Sender: TObject);
   procedure FormDestroy(Sender: TObject);
  p rivate
   { Private declarations }
   procedure hotKeyOn;
   procedure hotKeyOff;
   procedure hotKeyDown(var msg:TMessage);message WM_HOTKEY;
  public
   { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
{$APPTYPE CONSOLE}
var
  hotKeyID:integer;

procedure TForm1.FormCreate(Sender: TObject);
begin
  memo1.Lines.Clear;
  hotKeyOn;
end;

procedure TForm1.hotKeyDown(var msg: TMessage);
var
  pt:TPoint;
  hwnd:THandle;
  hwndParent:THandle;
  str:array[0..255] of char;
begin
  if (msg.LParamHi=VK_DELETE) and (msg.LParamLo=MOD_CONTROL) then
  begin
   GetCursorPos(pt);
   hwnd:=WindowFromPoint(pt);
   //Writeln('ok');

   memo1.Lines.Add('坐标窗体句柄:'+IntToStr(hwnd));
   GetWindowText(hwnd,str,256);
   memo1.Lines.Add('坐标窗体标题：'+str);
   GetClassName(hwnd,str,256);
   memo1.Lines.add('坐标窗体类名'+str);
   hwndParent:=GetParent(hwnd);
   memo1.Lines.Add('父窗口句柄'+IntToStr(hwndParent));
   GetWindowText(hwndParent,str,256);
   memo1.Lines.Add('父窗口标题:'+str);
   GetClassName(hwndParent,str,256);
   memo1.Lines.Add('父窗口类名'+str);

   memo1.Lines.Add(#13);

  end;
end;

procedure TForm1.hotKeyOff;
begin
  UnregisterHotKey(self.Handle,hotKeyID);
end;

procedure TForm1.hotKeyOn;
var
  r1:BOOL;
begin
  r1:=RegisterHotKey(self.Handle,
   hotKeyID,MOD_CONTROL,VK_DELETE
  );
  if not r1 then ShowMessage('RegisterHotKey error!');
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  hotKeyOff;
end;

end.