Polygon trouble. How to determine location

[lemming999]

Anyone know how to determine which polygon a user has clicked on screen, without using getPixel. I want to add a function that allows a user to delete Polygons from the screen by clicking on it. I want to do this by only referring to coordinates of Polygon (Polygon is 4 coordinates).

Any help would be gratefully received

 

[Jeffray]

I assume you use MFC. Otherwise you have to implement the algorithm yourself.

In the context of MFC, You can use CRgn class to declare your polygon and use PtInRgn() to test if a point is inside this polygon.