This snippet compares two methods of getting user value from MODO SDK. They give the same result but watch out for getting value via the ScriptSys service - it is MUCH slower, especially in MODO 14.1.

getUserValueCompare.cpp

    /*
     * The first method is by using user.value command.
     * This seems like indirect way compared to direct API call but it is actually WAY faster.
     * Especially as of MODO 14.1 release.
     * Use this one to get user value!
     */
    
    CLxUser_CommandService cmdSrv;
		CLxUser_Command userValCmd;
		int value = 0;

		if (cmdSrv.NewCommand(userValCmd, "user.value")) {
			CLxUser_Attributes cmdAttr;
			CLxLoc_ValueArray valArray;
			cmdAttr.set(userValCmd);
			cmdAttr.SetString(0, "userValueName");
			int valueArgIndex = cmdAttr.FindIndex("value");
			if (cmdSrv.QueryIndex(userValCmd, valueArgIndex, valArray)) {
				if (valArray.Count() > 0) {
					valArray.GetInt(0, &value);
				}
			}
		}

    /*
     * This is nice and compact but it's SLOW!!!
     * You won't notice with single calls, that's fine but with many calls the slowdown will be very very apparent.
     */
     CLxUser_ScriptSysService scriptSysService;
     CLxUser_UserValue listenValue;

     if (!scriptSysService.UserValueLookup("userValueName", listenValue)) {
         return false;
     }
        
     int value = 0;
     listenValue.GetInt(&value);