labviw 32bit/64bit and .dll 32bit/64bit

[JialingJade]

Hi,

I am using labview 2018. I need to call some devices'  .dll. The .dll is 64bit.

Shall I use labview 32bit or 64bit in order to call the 64bit .dll?

Or it does not matter?

Regards,

Jialing 

[cbutcher · Accepted solution]

Use LabVIEW 64-bit to call a 64-bit DLL.

If you can't do this in some circumstance (e.g. you're using 64-bit for a 64-bit DLL, and/or more RAM access, and then you also need a 32-bit DLL) you have to create a matching-bitness application with some method of communicating, e.g. in the example above you could create a 32-bit application that ran alongside your other application and used TCP or Network Streams or similar to communicate between applications. Not ideal...

For more details, see Calling a 32-Bit DLL from 64-Bit LabVIEW and Vice-Versa.

[JialingJade]

Thank you!

It resolved.