通过

Advise method

Schedules single or periodic notifications.

Syntax

HRESULT retVal = object.Advise(vtimeMin, vtimeMax, vtimeInterval, dwFlags, pTimerSink, pdwCookie);

Parameters

  • vtimeMin [in]
    Type: VARIANT

    A VARIANT of type DWORD that specifies the earliest time that the notification can occur.

  • vtimeMax [in]
    Type: VARIANT

    A VARIANT of type DWORD that specifies the latest time that the notification can occur. This should be zero if the timer has no expiration.

  • vtimeInterval [in]
    Type: VARIANT

    A VARIANT of type DWORD that specifies the desired interval between notifications. This should be zero for a single (nonperiodic) callback.

  • dwFlags [in]
    Type: DWORD

    Reserved. Must be set to 0.

  • pTimerSink [in]
    Type: ITimerSink

    A pointer to the ITimerSink interface to receive the events.

  • pdwCookie [out]
    Type: DWORD

    A pointer to a DWORD address to receive a cookie identifying the event request.

Remarks

By setting vtimeMax to zero, the timer will not expire; it must be explicitly stopped by calling ITimer::Unadvise. By setting vtimeInterval to zero, after a notification is sent, the notification is automatically removed.

The ITimer::Advise method can be used to simulate two Dynamic HTML (DHTML) methods: IHTMLWindow2::setTimeout and IHTMLWindow2::setInterval. For example, IHTMLWindow2::setTimeout generates a single callback after the number of milliseconds specified. To accomplish this with ITimer::Advise, call the method with the following parameters.

  • vtimeMin = timeCurrent + number of milliseconds until the timer times out.
  • vtimeMax = 0
  • vtimeInterval = 0

To simulate IHTMLWindow2::setInterval, which generates recurring callbacks after the specified number of milliseconds, call ITimer::Advise with the following parameters.

  • vtimeMin = timeCurrent + number of milliseconds until the timer times out.
  • vtimeMax = 0
  • vtimeInterval = number of milliseconds until the timer times out.