This function loads rxRTCtrl.DLL to be used within your REXX program. A REXX program using rxRTCtrl must contain the following two lines to access other functions inside rxRTCtrl:

CALL RXFuncAdd 'RTLoadFuncs', 'RXRTCTRL', 'RTLoadFuncs'
CALL RTLoadFuncs

Standard REXX errors are returned for this function, for example: Error 43 - Routine not found if rxRTCtrl.DLL can't be found.

This function also opens TESTCFG.SYS for read and write access. No errors are returned by this function if opening TESTCFG.SYS fails. For errors returned see each of the other functions.