Fixed this and allowed dynamic rescaling if the screen's resolution is changed on the fly. Improved the way a custom background is displayed if the screen colour depth is changed on the fly. Though there is a problem that you have to click on Mez Sure to get it to update the custom background's palette. Mez Sure's window furniture is now drawn in the correct place, but the Mez Sure window is not. Added tool tips for the custom buttons.
Transparency is still buggy.
More minor optimisations and corrections to the re-drawing code. Fixed incorrect colours appearing in 256 colour bitmaps when used as backgrounds on 256 colour displays. Improved the user interface. Added drag and drop of background BMP's into Mez Sure for changing the background bitmap. Corrected a bug in custom tiled backgrounds.