Second code snippet for annotation post

anno_snippet2.cs

private void DrawCompleteHandler(object sender, DrawEventArgs args)
{
_currentPoint = args.Geometry as MapPoint; //capture the point that where the mouse was clicked
TextSymbolPropsWindow win = new TextSymbolPropsWindow(); //My child window. This can be any you define.
win.EditMode = false; //this tells the window that this is a new annotation
win.Closed += new EventHandler(win_Closed); //subscribe to the window's Closed event
win.Show();
}