People said "Unlike C, there is no 'pointer' in plain VB. Probably we need to use some API functions to access pointers."
I found 3 buit-in VB pointer functions: StrPtr(), VarPtr() and ObjPtr(), but they are undocumented.
Anyone has any information about them? It will be helpful for someone.

(I saw @vbasicgirl used one of these in a thread.)