Demonstrates the use of a square proximity algorithm. Draws squares on a form using some techniques from the Drawing.Drawing2D namespace. Also demonstrates how to open a particular directory folder using Windows Explorer. Some pretty useful code can be found herein.

Enter: Pressing the Enter key draws a Cartesian coodinate graph and then draws a blue and black square onto it.
Shift-Enter: If you hold down the Shift key while pressing Enter, the Cartesian coordinate system is not redrawn.
Right-click: Right-clicking the mouse on the form will cause Windows Explorer to open the application startup directory for your perusal.

The license of this software is Freeware, you can free download and free use this calculator software.