Hi - I'm trying to update the value of a button in my UI via FLsetVal 1, 0, gkihbut1 where gkihbut1 is the handle to my button control, and 0 is the value for when the button is off. Here's the line in the global section of my orchestra that intitalizes said button: gkloop1,gihbut1 FLbutton " ", 1, 0, 3, 20, 20, 190, 135+$tabsYoffset, 0, 5, 0, 1, 0, 1 In the output, I get: WARNING: (fl_setWidgetValuei): not implemented yet; exp=1 and a crash or blue screen (depending on which machine I'm testing on) when I try to trigger this bit of code that setVal's the button. You guessed it, I'm running windows. Any chance this is an easy fix? ----- I'm writing an article on adapting Behringer's B-Control interface (http://www.behringer.com/BCR2000/index.cfm?lang=ENG) to my VCS3 (based on Steven Cook's implementation) emulator some of you remember from a while back, as well as a few other of my realtime instruments. Hence, all my recent latency-related questions. Anyone else using one of these devices? Thanks - b