Callback function

How this Callback function working ,is it using pointer or function pointer? 

int CVICALLBACK LatchStatus (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
		switch (event)
		{
		case EVENT_COMMIT:
			SetCtrlVal(); 
		        break;
		}
	return 0;
}