LCS API Function code`

We are on RMCobol v 12.17 32 bit.

We are trying to make sure that LCS can read Environment Variables from a Windows Machine to be used by code.

Code should successfully read the following 2 environment variables
HOMEDRIVE
HOMEPATH
Code should concatenate those 2 values, and code should then be able to use that single value as the new location to be used instead of any hardcoded references to the current drive. 
I am trying to find the function code for the GetFirmwareEnvironmentVariableExA function.  Do either of you have any idea where I can find this? Is it available in 12.17?
  1.        GetPrivateProfileInt code is WF03A
  2.        GetPrivateProfileString code is WF03B.
  3.        GetFirmwareEnvironmentVariableExA?