How to receive USB device handle from DLL

[HKALL]

Hi All,

I'm working on a firmware running on a development kit and I'm trying to communicate with the board through USB from Labview in Windows environment. For that, I've built a DLL which enumerates, opens Read/Write file handle and does a few other functions. I'm using standard Windows APIs for USB initialization. 

I use  "Call libr. function node" in labview to call these dll's. Inside the DLL, I use a function to initialize the USB which returns a device handle to the labview. My question is,  in "Call libr. function node" what is the parameter type I should use to receive the device handle? The device/file handle is defined in the WinAPI as a void pointer.

Any help will be much appreciated.

Thanks,

Hari

[Charlie_P]

Hello Hari,

Have you seen this thread?  DLL call with HANDLE type

[HKALL]

Hi Charlie,

That thread is really helpful. Thank you.

Regards,

Hari

[german4321]

how to receive and send bulk data from microcntroller using usb communication and dll concept ...same dll i will use in application1 and application2 for sending and receiving data

[Dafrizzy]

Hey I would recommend starting a new thread on our discussion forum with details about your specific issue. This thread is 9 years old so any new posts on it will not get much visibility.

Regards,