请教提取块的中心的方法

yuangw1234

请问各位大师:

本人写了下面一个程式就是想通过框选一个块来取得块的圆心，然后在这圆心处画一个螺丝孔（其中选择的块是圆组成的），但结果不行，如果将块换成是一个圆，则可以用

selobj.center属性来取得圆心，请老手指点怎么可以取得由圆组成的块的圆心,多谢!

Public Sub c(layerr As String)        

Dim ssetobj1 As AcadSelectionSet
Dim icount1 As Integer
icount1 = ThisDrawing.SelectionSets.Count
While (icount1 > 0)
    If ThisDrawing.SelectionSets.Item(icount1 - 1).Name = "yuan" Then
    ThisDrawing.SelectionSets.Item(icount1 - 1).Delete
    End If
    icount1 = icount1 - 1
    Wend
    Set ssetobj1 = ThisDrawing.SelectionSets.Add("yuan")
    ThisDrawing.Utility.Prompt "please select object"
    ssetobj1.SelectOnScreen
  Dim i1 As Integer
  Dim selobj1 As Acadblock
  For i1 = 0 To ssetobj1.Count - 1
      Set selobj1 = ssetobj1.Item(i1)
  dim pt as double

dim circ as acadcircle

pt=selobj1.center

set circ = thisdrawing.modelspace.addcircle(pt,10)

  Next

雪山飞狐_lzh

块里有几个圆?每个圆都要取圆心?发个块的图样上来最好

yuangw1234

有两个不同心的圆