How to read a Path value in the Registry

Hi all

I got the Problem that I want to read the Value of a certain Registry Path which changes frequently (every time a new sw version is installed)

[HKEY_LOCAL_MACHINE\SOFTWARE\Test\test_003]      (where test_003 will be increased by  every month1.

How can i read the current Value and put the last 3 digits into  a variable every time i start my script ?
Any help is very appreciated

thanks thorkfumble


PS: I know it would much easier to declare test_00n as a string value and read this out, but this is out of my control and not availlable