  If you want to use the most excellent MDisplay module in your own code,
then all you have to do is load it, load the pic at User_SpriteAddress%,
work out the sprite's X and Y sizes (User_SpriteSizeX% and User_SpriteSizeY%)
then write a bit of code that goes like this:

  User_Mode%=MODE
  REM Remember what mode we were in.

  SYS "MDisplay_Show",User_SpriteAddress%,User_SpriteSizeX%,User_SpriteSizeY%
  REM Leap into 480k's worth of glorious multisync memory.
  REM You *do* have enough memory, don't you?

  SYS "Wimp_SetMode",User_Mode%
  REM Return to our previous mode.

  OSCLI("FX 15")
  REM Clear the keyboard buffer of "///'''xzxz//x'zz " chars.

Simple, innit!
Look at the BASIC source code for more details on how to rip out
the size info from a sprite block, but note that I don't do it nicely!
Remember to say "Ta" to Colin if you use his module.
