Hi bouseman,
I assume you are using KmotionCNC? If so you might create a User Button (possibly hidden with no name) configured to execute a program in KFLOP Thread #2 that you could "push" from KFLOP with:
DoPCInt(PC_COMM_USER_BUTTON,3);
See the KFLOPtoPCCmdExamples.c and ExternalButtons.c examples.
HTH
Regards