I need an api call that will calculate the area of a shape that has been drawn on the screen. It is for use on a program to figurine square feet of a house. The user draws the outline of the house, we fill the drawing with a fill tool, then I need to determine the area of the filled space on the screen.

There has to be something that converts pixels to inches or feet or something. I just need some way of finding out how many pixels are in a filled area.

Please, if you have any suggestions, please let me know.

clint