MASK_PRESS
if (!(sp->_mouse_bstate & MASK_PRESS(b)))
if ((eventp->bstate & MASK_PRESS(b))) {
#define MASK_CHANGED(x) (!(ep->bstate & MASK_PRESS(x)) \
&& (ep->bstate & MASK_PRESS(b))) {
SP_PARM->_mouse_mask2 |= (MASK_PRESS(b) |
eventp->bstate = MASK_PRESS(n); \
sp->_mouse_bstate |= MASK_PRESS(n); \
sp->_mouse_bstate &= ~MASK_PRESS(n); \
eventp->bstate = (mmask_t) ((sp->_mouse_bstate & MASK_PRESS(n)) \
: MASK_PRESS(n)); \
sp->_mouse_bstate |= MASK_PRESS(n); \
eventp->bstate = MASK_PRESS(4);
eventp->bstate = MASK_PRESS(5);