Dim region1 As Autodesk..Interop.Common.AcadRegion
Dim region2 As Autodesk.AutoCAD.Interop.Common.AcadRegion
region1 = AcadApp.ActiveDocument.ModelSpace.AddRegion(circle)
region2 = AcadApp.ActiveDocument.ModelSpace.AddRegion(ccc)
region1.Boolean(Autodesk.AutoCAD.Interop.Common.AcBooleanType.acSubtraction, region2)
布尔运算不了????????为什么?????