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用PromptPointOptions提示采得点插入块参照后，插入的点和显示图形不在一个位置，且，在插入点位置有一个奇怪的方形框与显示图形对应（无论移动哪一个，另外一个也随之移动），如图
file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/5%3GTL7MSJI6}DB{B}I$MFD.jpg
右上角是显示的三个图形，左下角是实际插入时候点击的位置，这三个方框随右上角的图形的运动而运动，见鬼了，望高手指教原因，代码如下：
Dim ed As Editor = AcadApp.DocumentManager.MdiActiveDocument.Editor
Dim db As Database = AcadApp.DocumentManager.MdiActiveDocument.Database
' 普通的点交互操作.
Dim optPoint As New PromptPointOptions(vbCrLf & "请指定放置点:")
Dim resPoint As PromptPointResult = ed.GetPoint(optPoint)
If resPoint.Status PromptStatus.OK Then Return ObjectId.Null
Using trans As Transaction = db.TransactionManager.StartTransaction()
Dim bt As BlockTable = trans.GetObject(db.BlockTableId, OpenMode.ForRead)
'如果没有blockName表示的块，则程序返回
If (bt.Has(blockname) = False) Then
Return ObjectId.Null
End If
'创建一个块参照并设置插入点
Dim mt As Matrix3d = ed.CurrentUserCoordinateSystem
Dim p3 As Point3d = resPoint.Value.TransformBy(mt)
Dim block As BlockTableRecord = trans.GetObject(bt(blockname), OpenMode.ForRead)
Dim blockref As BlockReference = New BlockReference(p3, bt(blockname))
'以写的方式打开当前空间（模型空间或图纸空间）
Dim btr As BlockTableRecord = trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite)
obid = btr.AppendEntity(blockref) '在当前空间加入创建的块参照
'通知事务处理加入创建的块参照
trans.AddNewlyCreatedDBObject(blockref, True)
trans.Commit() '提交事务处理以实现块参照的真实加入
End Using
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置顶卡
