Pointers

[Dark Kai]

hi there, I was just wondering if this two are similar

 

C++

int *pointer

 

vb.net

dim pointer as intptr

 

BTW i dunno what is intptr. just know that it is suppose to be a pointer of some sort.

Thanks in advance.

[Bucky]

IntPtr is a structure that is basically a strongly-typed Integer.

It's meant for storing things like window handles and procedure

addresses. It does not actually create a pointer that you can

play around with. If you need to pass a pointer of a variable to

a function, pass it regularly, but declare the parameter as ByRef

in the method's signature.

[Dark Kai]

oh ok...

well then lets say i've a int variable Test

 

dim Test as integer

 

how do i get the address of this variable ?

and how do i pass it in to the IntPtr ?

[PlausiblyDamp]

You could pass the integer by reference to a sub or function

 

private sub DoThing(ByRef i as integer)

end sub

'elsewhere you could use
dim Test as integer
DoThings(Test)    'This would pass a reference to Test to the sub.

 

it may be easier if you give a better idea of what you are trying to do and why you feel you need pointers.

[/code]

[Dark Kai]

well actually i'm trying to do a vertexbuffer rendering on CsGL. I need to pass in a IntPtr for my image buffer. I'm kindda stuck there so i thought it's better to understand IntPtr 1st.

 

I would also appreciate if u know about vertexbuffer couze i know near nothing about how to implement it.

thanks a lot.