IUIAnimationTimerUpdateHandler::OnUpdate method (uianimation.h)

Handles update events from the timer.

Syntax

HRESULT OnUpdate(
  [in]  UI_ANIMATION_SECONDS       timeNow,
  [out] UI_ANIMATION_UPDATE_RESULT *result
);

Parameters

[in] timeNow

The current timer time, in seconds.

[out] result

Receives a member of the UI_ANIMATION_UPDATE_RESULT enumeration, indicating whether any animation variables changed as a result of the update.

Return value

If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. See Windows Animation Error Codes for a list of error codes.

Remarks

This method is used by the UIAnimationTimer object to update the state of the UIAnimationManager object. The UIAnimationTimer object calls UIAnimationTimerEventHandler::OnPostUpdate only when calls to this method return a result of UI_ANIMATION_UPDATE_VARIABLES_CHANGED.

Requirements

See also

IUIAnimationTimerEventHandler::OnPostUpdate

IUIAnimationTimerEventHandler::OnPreUpdate

IUIAnimationTimerUpdateHandler