Convert an object pointer to a handle
[C++]
long AddObjectHandle(
T* value
);
A pointer to an object, usually created by an add-in function.
The function returns a handle that represents the object, and which
can be used later as a parameter to ObjectFromHandle().
The function adds the object pointer to the handle store,
which is thereafer in control of the object's lifetime.
Header: xlhandle.h