Calling a dll file from vb to read the value of the pointer

Dear all,

I have a problem to read the value of a pointer in VB.NET through using a DLL file.  Here is the concept:

The DLL file has one of its argument a pointer:
xDLL (PointerVar).

The xDLL file is called from VB.NET as follows:

LOADxDLL(ByRef PointerVar As IntPtr)

I want to read the value of the pointer PointerVar (not the address) in order to use it to show a progress of a simulation.

Any hint is appreciated.

Thanks