AreaLinePatches.Form1.button1_Click C# (CSharp) Method

		private void button1_Click(object sender, System.EventArgs e)
		{
			//Get the GraphicsContainer
			IGraphicsContainer graphicsContainer = axPageLayoutControl1.GraphicsContainer;
      
			//Get the MapFrame
			IMapFrame mapFrame = (IMapFrame) graphicsContainer.FindFrame(axPageLayoutControl1.ActiveView.FocusMap);
			if (mapFrame == null) return;
			
			//Create a legend
			UID uID = new UIDClass();
			uID.Value = "esriCarto.Legend";

			//Create a MapSurroundFrame from the MapFrame
			IMapSurroundFrame mapSurroundFrame = mapFrame.CreateSurroundFrame(uID, null);      
			if (mapSurroundFrame == null) return;				
			if (mapSurroundFrame.MapSurround == null) return;
			//Set the name 
			mapSurroundFrame.MapSurround.Name = "Legend";
        
			//Envelope for the legend
			IEnvelope envelope = new EnvelopeClass();
			envelope.PutCoords(1, 1, 3.4, 2.4);

			//Set the geometry of the MapSurroundFrame 
			IElement element = (IElement) mapSurroundFrame;
			element.Geometry = envelope; 
        
			//Add the legend to the PageLayout
			axPageLayoutControl1.AddElement(element, Type.Missing, Type.Missing, "Legend", 0);
        
			//Refresh the PageLayoutControl
			axPageLayoutControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

			//disable/enable buttons
			cmdDraw.Enabled = false;
			cmdDelete.Enabled = true;
			cmdChangeArea.Enabled = true;
			cmdChangeLine.Enabled = true;
		}