Using the conio routine _setcursortype(_NOCURSOR) to turn off the text cursor
has no effect when the program is running in a window under Win 3.1. It works
fine in full screen mode, but has no effect when the program is running in a
window.

In conio.c, the _NOCURSOR flag causes the value 0x0700 to be passed to the
BIOS set cursor routine. If this is replaced with 0x2000, the problem goes
away. I have no idea why this is or if the problem is with djgpp or with
Windows, but it works anyway :-)