IUIAnimationVariable::SetVariableIntegerChangeHandler method (uianimation.h)

Specifies an integer variable change handler. This handler is notified of changes to the integer value of the animation variable.

Syntax

HRESULT SetVariableIntegerChangeHandler(
  [in, optional] IUIAnimationVariableIntegerChangeHandler *handler
);

Parameters

[in, optional] handler

An integer variable change handler.

The specified object must implement the IUIAnimationVariableIntegerChangeHandler interface or be NULL.

See Remarks.

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

Passing NULL for the handler parameter causes Windows Animation to release its reference to any handler object you passed in earlier. This technique can be essential for breaking reference cycles without having to call the IUIAnimationManager::Shutdown method.

IUIAnimationVariableIntegerChangeHandler::OnIntegerValueChanged is called only if the rounded value has changed since the last update.

Requirements

See also

IUIAnimationVariable

IUIAnimationVariable::SetVariableChangeHandler

IUIAnimationVariableChangeHandler