Use left or right mouse button to draw (just for fun) in DOS.

The point is to demonstrate the use of mouse in DOS using mouse interrupt 33h from assembly language. The assembly language function can itself be called by compiling the assembly language program as a binary file and using CALL ABSOLUTE in QuickBASIC, or by compiling the program as a library that can converted to a Quick library (QLB) and declaring the subroutines and functions.