GpsSetNotificationCallback

Sets an application defined callback function to receive messages from the Toolkit

Parameters

Parameters	Description
GPSNOTIFYPROC pNotifyProc	Pointer to the application-defined notification function
long lUserParam	Long integer representing to the application-defined user parameter that will be passed to the notification function

Return Value

If the notification function is successfully set, then the return value will be GPSERROR_NONE. If the notification function is not successfully set, then the return value will be GPSERROR_INVALID_PARAMETER.

Remarks

If pNotifyProc is NULL, then the GPS engine will no longer send status messages.
lUserParam is often useful to pass a window handle or an MFC CWnd pointer that can be used in the callback function to post a windows message to an application window.
For information about the callback function see the GPSNOTIFYPROC callback function.