Calling driver DLLs

[Aalenox]

I am trying to write a LabView program to control a digitizer card. The manufacturer provided a DLL and some example C/C++ code to do this.  My problem is finding out how to pass the driver handle within LabView.  The C code to call this dll looks like this:

# define drv_handle void* // This is in the header

drv_handle hDrv; // returns the handle to the opended driver or NULL in case of error
hDrv = spcm_hOpen ("/dev/spcm0"); // string to the driver to open

I can get the card to initialize just fine. I can't figure out how to pass the void* through LabView in to the other functions.  Any suggestions or places to look?

[rolfk · Accepted solution]

That would have to be a "pointer sized integer". signed or unsigned doesn't really matter, but you should definitely keep it consistent and personally I prefer unsigned.

[Aalenox]

That worked. Thanks!