Int 50 Fn 0002  - Vanderaart Text Windows - Put Character In Window        [V]

   AX = 0002h
   BL = character
   BH = attribute
   DL = column
   DH = row
   DI = window handle

Return: AX = status
       0000h if successful
       FFFFh if outside window

See Also: AX=0000h