glutEntryFunc  -  sets  the mouse enter/leave callback for
       the current window.

SYNTAX

       void glutEntryFunc(void (*func)(int state));

ARGUMENTS

       func      The new entry callback function.

DESCRIPTION

       glutEntryFunc sets the mouse enter/leave callback for  the
       current  window.  The  state  callback parameter is either
       GLUT_LEFT  or  GLUT_ENTERED  depending  on  if  the  mouse
       pointer has last left or entered the window.

       Passing  NULL  to glutEntryFunc disables the generation of
       the mouse enter/leave callback.

       Some window systems may not generate accurate  enter/leave
       callbacks.   X IMPLEMENTATION NOTES An X implementation of
       GLUT should generate accurate enter/leave callbacks.

SEE ALSO

       glutMotionFunc, glutCreateWindow

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)