I made my dialog box in my resource file. I have a checkbox that I made using the keyword CHECKBOX, but I actually need a 3state checkbox and i can't find the right keyword( I don't think they're called keywords.. I guess I can't find it) for it. Here what it looks like, ID_DIALOG_NEW DIALOGEX DISCARDABLE 140,140,150,200 style DS_MODALFRAME | WS_POPUPWINDOW | WS_CAPTION | WS_EX_DLGMODALFRAME CAPTION "New" FONT 8,"MS Sans Serif" BEGIN GROUPBOX "Setup",ID_STATIC,4,1,143,196 GROUPBOX "Player 1",ID_STATIC,8,15,135,40 CHECKBOX "",ID_CHECK_PLAYER1,12,27,50,10 CHECKBOX "Human",ID_CHECK_HUMAN1, 90,20,50,10 END