HaveObjectData -- check if data exists in an object (V6.1)
Synopsis
b = HaveObjectData(type, id, key$)
Function
This function can be used to check if private data has been stored in an object
under the specified key using the SetObjectData() function.
Just pass the type and the identifier of the object and the key$ to check to this function
and it will return whether there is data for the key or not.