Pointers to inherited classes

I have class #1. Class #2, is completely unrelated, class #3 is derived from #1, class 4 is derived from #1, And class 5 had multiple inheritance from both #2 and #1. Class 6 contains a pointer to type class #1 (these are not the real names). Can that pointer also be used to hold the address of classes 3, 4, and 5? If not all, which ones? Thanks if you can help.

Sean Mackrory
[email protected]

You'll be able to use the pointer to call any virtual methods in the derived classes that are inherited from class 1 but if the pointer is to a class 5 instance then it will not be able to call any virtual methods derived from class 2 (unless you use a cast).