SetTimer的生成随机IDEvent [英] SetTimer generate a random IDEvent

问题描述

当我尝试使用Windows SetTimer函数，它产生，如果我已经指定了一个！计时器甚至 IDEvent

When I try to use the Windows SetTimer function, it generate a IDEvent for the timer even if I have specified one!

这

SetTimer(0,999,10000,@timerproc); 

在

procedure timerproc(hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR;dwTime: DWORD); stdcall;
begin
KillTimer(0, idEvent);
showmessage(inttostr(idevent));
end;

返回：

随机数！

是否有可能通过自己，而不是来管理的Windows选择对我来说我的计时器？

Is it possible to manage my timers by myself instead of Windows choosing for me?

非常感谢你！

推荐答案

如果你想处理在一个程序中处理多个定时器事件，然后通过特定的窗口处理它而不是特定常规：

If you want to handle multiple timer events in a single routine, then handle it by specific window rather then by specific routine:

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    FTimerWindow: HWND;
    procedure TimerProc(var Msg: TMessage);
  end;

...

procedure TForm1.FormCreate(Sender: TObject);
begin
  FTimerWindow := Classes.AllocateHWnd(TimerProc);
  SetTimer(FTimerWindow, 999, 10000, nil);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  Classes.DeallocateHWnd(FTimerWindow);
end;

procedure TForm1.TimerProc(var Msg: TMessage);
begin
  if Msg.Msg = WM_TIMER then
    with TWMTimer(Msg) do
      case TimerID of
        999:
          //
      else:
        //
      end;
end;

这篇关于SetTimer的生成随机IDEvent的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！