This writes an image to the LCD by taking a .NET Drawing::Bitmap as the source for the image.
Dest- 0=Foreground,1=Background memory in tablet
Mode-0-3 as defined in LCDWriteBitmap
XPos-Location in LCD coordinates (upper left- 0,0)
YPos-Same
BitmapData-Source for rendered image
True if succesful, False if not.