AE创建气泡式的提示框（VB.Net和C#源码）
 下面是用AE创建气泡式提示框的方法:
 
 1、VB.Net源码
  ''' <summary>
  ''' 创建文本提示框
  ''' </summary>
  ''' <param name="x">提示框标识的位置X坐标</param>
  ''' <param name="y">提示框标识的位置Y坐标</param>
  ''' <param name="pTextString">提示框中显示的文本</param>
  ''' <param name="pPoint">提示框箭头指向的点</param>
  ''' <param name="pGraphicsContainer">包含提示框的graphicscontainer</param>
  ''' <returns></returns>
  ''' <remarks></remarks>
  Public Function CreateTextElement(ByVal x As Double, ByVal y As Double, ByVal pTextString As String, Optional ByVal pPoint As IPoint = Nothing, Optional ByVal pGraphicsContainer As IGraphicsContainer = Nothing) As IElement
    Dim pElement As IElement = New MarkerElementClass()
    Dim pTElement As IElement = New TextElementClass()
    Dim pTextSymbol As IFormattedTextSymbol = New TextSymbolClass()
    Dim pBalloonCallout As IBalloonCallout = CreateBalloonCallout(x, y)
    Dim pColor As IRgbColor = New RgbColorClass()
    pColor.Red = 150
    pColor.Green = 0
    pColor.Blue = 0
    pTextSymbol.Color = pColor
    Dim pTextBackground As ITextBackground
    pTextBackground = pBalloonCallout
    pTextSymbol.Background = pTextBackground
    pTextSymbol.Size = 8
    CType(pTElement, ITextElement).Symbol = pTextSymbol
    CType(pTElement, ITextElement).Text = pTextString
    If pPoint Is Nothing Then pPoint = New Point : pPoint.PutCoords(x + Const_Dis, y + Const_Dis)
    pTElement.Geometry = pPoint
    pGraphicsContainer.AddElement(pTElement, 1)
    Return pTElement
  End Function

  ''' <summary>
  ''' 创建balloon型提示框
  ''' </summary>
  ''' <param name="x">提示框所在位置X坐标</param>
  ''' <param name="y">提示框所在位置Y坐标</param>
  ''' <returns></returns>
  ''' <remarks></remarks>
  Public Function CreateBalloonCallout(ByVal x As Double, ByVal y As Double) As IBalloonCallout
    Dim pRgbClr As IRgbColor = New RgbColorClass()
    pRgbClr.Red = 255
    pRgbClr.Blue = 255
    pRgbClr.Green = 255
    Dim pSmplFill As ISimpleFillSymbol = New SimpleFillSymbolClass()
    pSmplFill.Color = pRgbClr
    pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid
    Dim pBllnCallout As IBalloonCallout = New BalloonCalloutClass()
    pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRoundedRectangle
    pBllnCallout.Symbol = pSmplFill
    pBllnCallout.LeaderTolerance = 1
    Dim pPoint As IPoint = New ESRI.ArcGIS.Geometry.PointClass()
    pPoint.X = x
    pPoint.Y = y
    pBllnCallout.AnchorPoint = pPoint
    Return pBllnCallout
  End Function


  2、C#源码
 
       public void CreateTextElment(double x, double y)
        {
            IPoint pPoint = new PointClass();
            IMap pMap = axMapControl1.Map;
            IActiveView pActiveView = pMap as IActiveView;
            IGraphicsContainer pGraphicsContainer;
            IElement pElement = new MarkerElementClass();
            IElement pTElement = new TextElementClass();
            pGraphicsContainer = (IGraphicsContainer)pActiveView;
            IFormattedTextSymbol pTextSymbol = new TextSymbolClass();
            IBalloonCallout pBalloonCallout = CreateBalloonCallout(x, y);
            IRgbColor pColor = new RgbColorClass();
            pColor.Red = 150;
            pColor.Green = 0;
            pColor.Blue = 0;
            pTextSymbol.Color = pColor;
            ITextBackground pTextBackground;
            pTextBackground = (ITextBackground)pBalloonCallout;
            pTextSymbol.Background = pTextBackground;
            ((ITextElement)pTElement).Symbol = pTextSymbol;
            ((ITextElement)pTElement).Text = "测试";
            pPoint.X = x + 42;
            pPoint.Y = y + 42;
            pTElement.Geometry = pPoint;
            pGraphicsContainer.AddElement(pTElement, 1);
            pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }
      
        public IBalloonCallout CreateBalloonCallout(double x, double y)
        {
            IRgbColor pRgbClr = new RgbColorClass();
            pRgbClr.Red = 255;
            pRgbClr.Blue = 255;
            pRgbClr.Green = 255;
            ISimpleFillSymbol pSmplFill = new SimpleFillSymbolClass();
            pSmplFill.Color = pRgbClr;
            pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid;
            IBalloonCallout pBllnCallout = new BalloonCalloutClass();
            pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRectangle;
            pBllnCallout.Symbol = pSmplFill;
            pBllnCallout.LeaderTolerance = 1;
            IPoint pPoint = new ESRI.ArcGIS.Geometry.PointClass();
            pPoint.X = x;
            pPoint.Y = y;
            pBllnCallout.AnchorPoint = pPoint;
            return pBllnCallout;
        }