- Tcl_CreateObjTrace.tcl86(3), Tcl_CreateTrace(3), Tcl_CreateObjTrace(3), Tcl_DeleteTrace(3)
- arrange for command execution to be traced
- Tcl_CreateObjTrace.tcl90(3), Tcl_CreateTrace(3), Tcl_CreateObjTrace(3), Tcl_CreateObjTrace2(3), Tcl_DeleteTrace(3)
- arrange for command execution to be traced