Edges where taskbar can be placed (in coherence mode).
enum _PRL_WINDOW_EDGE_MASK { WINDOW_LEFT_EDGE_MASK = (0x1L << 0), WINDOW_TOP_EDGE_MASK = (0x1L << 1), WINDOW_RIGHT_EDGE_MASK = (0x1L << 2), WINDOW_BOTTOM_EDGE_MASK = (0x1L << 3), WINDOW_ALL_EDGE_MASK = WINDOW_LEFT_EDGE_MASK|WINDOW_TOP_EDGE_MASK|WINDOW_RIGHT_EDGE_MASK|WINDOW_BOTTOM_EDGE_MASK };
PrlEnums.h