Pointers to objects?

[George Deluca Member Find all posts View Profile Close George Deluca]

OK, I'm just doing some preliminary stuff in learning OOP stuff, so bear with me.

If I have an array of Objects, one of which is 'active' at a time.

Can I create a pointer to the active object? i.e.

(Sort of)
GLOBAL Tabs()    AS iTabData                       ' Table of active tab objects
DIM ActiveTab    AS CLASS POINTER              ' (doesn't compile)
ActiveTab = VARPTR?/CODEPTR?(Tabs(x))       ' Assign pointer

What is the best method (efficiency and coding ease) to reference the active object's methods etc. from the active entry?

Or am I Waaayyyy out in left field?

George

[José Roca Member Find all posts View Profile Close José Roca]

???

Tabs(x).<method name>

[Edwin Knoppert Member Find all posts View Profile Close Edwin Knoppert]

Local x as ... (interface name)

x = nothing ' make sure an existing reference is released.

Poke dword VarPtr( x ), ObjPtr(currentobject)
x.addref()

x.dosomething()

release:
x = nothing or just let it go out of scope (exit function).

[Bob Zale Creator of PowerBASIC Find all posts View Profile Close Bob Zale]

Local x as ... (interface name)
x = nothing ' make sure an existing reference is released.
Poke dword VarPtr( x ), ObjPtr(currentobject)
x.addref()
x.dosomething()
release:
x = nothing or just let it go out of scope (exit function).

I'm sorry, but that's not a good idea. Not good at all. It attempts to circumvent everything the compiler does for you automatically to protect you and prevent leaks. The following code accomplishes the same thing with complete safety and accountability:

x = currentobject
x.dosomething()

Best regards,

Bob Zale

[Edwin Knoppert Member Find all posts View Profile Close Edwin Knoppert]

What was i thinking?

[George Deluca Member Find all posts View Profile Close George Deluca]

Thanks guys.

Bob: OK, yours is straightforward, but what is 'x' defined as?

George
(OOP is clear in concept, murky in the details)

[Stuart McLachlan Member Find all posts View Profile Close Stuart McLachlan]

Thanks guys.

Bob: OK, yours is straightforward, but what is 'x' defined as?

George
(OOP is clear in concept, murky in the details)

The interface of the class you want to use.