Just use one picturebox and see if you are inside this area. The area is a semi cycle with center x0, 0
. So calculate the
squareroot(y*y + (x0-x)*(x0-x)), x,y is where you click.
If it is smaller from the radius you are inside otherwise outside.
Edit.
Create a graphic path
using System.Drawing.Drawing2D; //is needed for the graphics path
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse (x, y, width, height); //x,y the upper left corner of the rect containing the ellipse
if( gp.IsVisible (e.X, e.Y) ){
//is inside
}
else{
//is outside
}
Note: The y coordinate will be negative
valter