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Form2: TForm2;
H: Cardinal = 0;
Implementation
{$R *.dfm}
//------------------------------------------------------------------------------
// È¡µÃÊó±êËùÔÚ´¦´°ÌåµÄ¾ä±ú
//------------------------------------------------------------------------------
Procedure TForm2.BtnGetHandleClick(Sender: TObject);
Var
Pt: TPoint;
Begin
If GetCursorPos(Pt) Then
H := WindowfromPoint(Pt)
Else
H := 0;
End;
//------------------------------------------------------------------------------
// ½«´°ÌåÖö¥
//------------------------------------------------------------------------------
Procedure TForm2.BtnTopMostClick(Sender: TObject);
Var
Rc: TRect;
Begin
If H = 0 Then
Exit;
If GetWindowRect(H, Rc) Then
SetWindowPos(H, HWND_TOPMOST, Rc.Left, Rc.Top, Rc.Right - Rc.Left,
Rc.Bottom - Rc.Top, SWP_SHOWWINDOW)
End;
//------------------------------------------------------------------------------
// È¥µô´°ÌåµÄ±ß¿ò
//------------------------------------------------------------------------------
Procedure TForm2.BtnNoBorderClick(Sender: TObject);
Var
WsStyle: Cardinal;
Begin
If H = 0 Then
Exit;
WsStyle := GetWindowLong(H, GWL_STYLE);
WsStyle := WsStyle And (Not WS_BORDER) And (Not WS_CAPTION);
SetWindowLong(H, GWL_STYLE, WsStyle);
End;
//------------------------------------------------------------------------------
// Òƶ¯´°Ìå
//------------------------------------------------------------------------------
Procedure TForm2.BtnMoveClick(Sender: TObject);
Var
Dx, Dy: Integer;
Rc: TRect;
Begin
If H = 0 Then
Exit;
Dx := StrToIntDef(TxtDx.Text, 0);
Dy := StrToInt


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procedure TWinControl.CreateParams(var Params: TCreateParams);
begin
FillChar(Params, SizeOf(Params), 0);
with Params do
begin
    Caption := FText;
    Style := WS_CHILD or WS_CLIPSIBLINGS;
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1¡¢ÏÈÓÃConst ¶¨ÒåÒ»¸ö³£Á¿£¬ÀýÈç const WM_MyMessage=WM_USER+$200;
2¡¢ÔÚҪʵÏÖµÄunitÖж¨ÒåÒ»¸ö˽Óз½·¨
   procedure doMyMessage(var msg:TMessage);message WM_MyMessage;
3¡¢ÊµÏÖÕâ¸ö˽Óз½·¨
    procedure TForm1.doMyMessage(var msg:TMessage);
begin
  //
  if msg. ......
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