BHL = pointer to token table base address (-1 for default system token table)
OUT, if call successful:
Fc = 0
BHL = old token base
Registers changed after return:
Sets up a local token table (independent of the "menu topic help" tokens). The token table is of the same structure format as the MTH. Please refer to Application Static Structure for further details.
OS_Wrt, write token
OS_Wts, write tokenized string