◄Full List► ◄Up► ◄Next► ◄Previous► ──────────────────────────────────────────────────────────────────────────── BS_3STATE Same as an auto-check box, except that the state of the box alternates between selected, unselected, and halftone. The owner window receives a WM_CONTROL message and changes the state of the three-state check box when the user selects the box. ♦