It seems that there is a HELPID_GAUGE_TOGGLE_CHECKLIST_WINDOW available, but there is no corresponding KEY_event for the darn checklist!Why would MS have a HELPID for something but not supply the command to make it work? :(I wanted to ditch XML altogether and build the simicons totally in C, but now I'm stuck...Does anyone have a solution?

Never mind, I found the "missing command..." :) It is: KEY_KNEEBOARDThat's quite typical of MSFS - inconsistency!Logically, it should have been KEY_TOGGLE_CHECKLIST_WINDOW, or they should have named the helpid HELPID_KEY_KNEEBOARD... :)But, I'm still stuck with the XML "n-number decal gauge..." :(