Sets the mouse enter/leave callback for the current window.
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.
Glut Class | Tao.FreeGlut Namespace | Glut.EntryCallback