Nvidia driver version

Hi,

I use the nvcuvenc.dll in my software and now I want to check whether the target system has CUDA and the right version of the nvidia display driver.
How I can receive the version number of the nvidia display driver? Cause the PDF said i need at least v181.20 for the encoder. But with the CUDART.DLL I
can only query the CUDA version number. Any hints?

Ocrana