没有,不过可以使用Application.OnMessage来变通的处理:unit Unit1;interfaceuses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ComCtrls;type
TForm1 = class(TForm)
TrackBar1: TTrackBar;
procedure FormCreate(Sender: TObject);
private
procedure AppMessage(var Msg: TMsg; var Handled: Boolean); { Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.DFM}
procedure TForm1.AppMessage(var Msg: TMsg; var Handled: Boolean);
begin
if MSG.hwnd = TrackBar1.Handle then
if Msg.message = WM_LBUTTONDOWN then
beep;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
Application.OnMessage:=AppMessage;
end;end.
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ComCtrls;type
TForm1 = class(TForm)
TrackBar1: TTrackBar;
procedure FormCreate(Sender: TObject);
private
procedure AppMessage(var Msg: TMsg; var Handled: Boolean); { Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.DFM}
procedure TForm1.AppMessage(var Msg: TMsg; var Handled: Boolean);
begin
if MSG.hwnd = TrackBar1.Handle then
if Msg.message = WM_LBUTTONDOWN then
beep;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
Application.OnMessage:=AppMessage;
end;end.
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货