vc中如何填充区域？？？？

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<RE class=Code>Sub Example_AddHatch()
    ' This example creates an associative gradient hatch in model space.
   
    Dim hatchObj As AcadHatch
    Dim patternName As String
    Dim PatternType As Long
    Dim bAssociativity As Boolean
   
    ' Define the hatch
    patternName = "CYLINDER"
    PatternType = acPreDefinedGradient '0
    bAssociativity = True
   
    ' Create the associative Hatch object in model space
    Set hatchObj = ThisDrawing.ModelSpace.AddHatch(PatternType, patternName, bAssociativity, acGradientObject)
    Dim col1 As AcadAcCmColor, col2 As AcadAcCmColor
    Set col1 = AcadApplication.GetInterfaceObject("AutoCAD.AcCmColor.16")
    Set col2 = AcadApplication.GetInterfaceObject("AutoCAD.AcCmColor.16")
    Call col1.SetRGB(255, 0, 0)
    Call col2.SetRGB(0, 255, 0)
    hatchObj.GradientColor1 = col1
    hatchObj.GradientColor2 = col2
   
    ' Create the outer boundary for the hatch (a circle)
    Dim outerLoop(0 To 0) As AcadEntity
    Dim center(0 To 2) As Double
    Dim radius As Double
    center(0) = 3: center(1) = 3: center(2) = 0
    radius = 1
    Set outerLoop(0) = ThisDrawing.ModelSpace.AddCircle(center, radius)
   
    ' Append the outerboundary to the hatch object, and display the hatch
    hatchObj.AppendOuterLoop (outerLoop)
    hatchObj.Evaluate
    ThisDrawing.Regen True
End Sub</PRE><RE class=Code>上面的这段代码如何用vc实现？？？</PRE>