Question

I am drawing a curve in Zedgraph like this:

GraphPane myPane = zgc.GraphPane;
PointPairList list1 = new PointPairList();
for(int i =0; i<10; i++)
    list1.Add(i,i);            
LineItem myCurve = myPane.AddCurve("Title",
          list1, Color.Red, SymbolType.None);        

zgc.AxisChange();
zgc.Refresh();

How can I display a cursor (or any other graphic object) at a certain x, y point on myCurve like this:

SetCursor(myCurve, list1[3]);

Answer 1

Knowing specific point of your curve you can use GraphPane.GeneralTransform(...) method

So using following code:

var myPoint = myCurve[3];
var screenPoint = myPane.GeneralTransform(myPoint.X, myPoint.Y, CoordType.AxisXYScale);

would give you coordinates transformed to specific point on screen (in pixels).

Then you need to find some higher-level method (probably in windows forms…) that would move your cursor to that point.