4.TimeProc

原文：

The TimeProc function callback function that is called once upon the expiration of a single event or periodically upon the expiration of periodic events.

void CALLBACK TimeProc(

  UINT uID,     

  UINT uMsg,    

  DWORD dwUser, 

  DWORD dw1,    

  DWORD dw2     

);

 

TimeProc is a placeholder for the application-defined function name.

Parameters

uID

Identifier of the timer event. This identifier was returned by the timeSetEvent function when the timer event was set up.

uMsg

Reserved; do not use.

dwUser

User instance data supplied to the dwUser parameter of timeSetEvent.

dw1 and dw2

Reserved; do not use.

Return Values

This function does not return a value.

Remarks

Applications should not call any system-defined functions from inside a callback function, except for PostMessage, timeGetSystemTime, timeGetTime, timeSetEvent, timeKillEvent, midiOutShortMsg, midiOutLongMsg, and OutputDebugString.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in mmsystem.h.
  Import Library: User-defined.

See Also

Multimedia Timers Overview, Multimedia Timer Functions, timeSetEvent, PostMessage, timeGetSystemTime, timeGetTime, timeKillEvent, midiOutShortMsg, midiOutLongMsg, OutputDebugString

翻译：

 一旦一个信号事件到期或一个周期事件到期，TimerProc回调函数被调用。

void CALLBACK TimeProc(

  UINT uID,     

  UINT uMsg,    

  DWORD dwUser, 

  DWORD dw1,    

  DWORD dw2     

);

对于应用程序定义的函数名TimeProc为一个占位符。

参数：

   uID：时间事件标识符，当定时器被建立时，timerSetEcent函数返回该标识符。

   uMsg：保留，未使用。

   dwUser:由timeSetEvent函数的dwUser参数提供的用户实例数据。

   dw1 and dw2 ：保留字，未使用。

备注：应用程序不能从回调函数内部调用系统定义的函数，除了PostMessage,timeGetSystemTime,timeGetTime,timeSetEvent.TimeKillEvent,midiOutShortMsg,midiOutLongMsg和OutpuitDebugString.