gpc = xcb_grab_pointer(conn, 0, win->id, MOUSEMASK,
XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC,
XCB_WINDOW_NONE, cursor, XCB_CURRENT_TIME);
gpc = xcb_grab_pointer(conn, 0, win->id, MOUSEMASK,
XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC,
XCB_WINDOW_NONE, cursor, XCB_CURRENT_TIME);