how to change change zoom of points ??

[YassineEL_JADIDI]

hello,
i have this code to zoom to selected point in my datagrid :

 MapPoint myPoint = g.Geometry as MapPoint;
                g.Select();
                if (myPoint != null)
                {
                    Envelope env = new Envelope(myPoint.X - 1000, myPoint.Y - 1000, myPoint.X + 1000, myPoint.Y + 1000);
                    MyMap.ZoomTo(env);
                }

but i want to change this zoom, where can i edit ??

[DominiqueBroux]

but i want to change this zoom, where can i edit ??

I don't understand well the question.
The argument to the method ZoomTo is the envelope you ned to zoom to.
To change it you need to change the way that envelope is initialized (for example by changing the size).