If an item in the string pointed to by pType matches the first type in the string associated with hstrType in the DRAGITEM structure, TRUE is returned.
A target application uses this function to determine if it supports the true type of a dragged object. If the application does not support the true type, it can either disallow a drop or change its default operation. If the default operation is a move, the drop should be disallowed, or the operation changed to a copy to prevent any loss of data for the object.