Private Sub insertimage(fname As String, bname As String, pt As Point3d, rot As Double, xx As Double, yy As Double)
    Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument()
    Dim doc As Autodesk.AutoCAD.ApplicationServices.Document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument
    Using db As Database = doc.Database
        Using tm As Transaction = db.TransactionManager.StartTransaction()
            Try
                Dim imageDictID As ObjectId = RasterImageDef.GetImageDictionary(db)
                If imageDictID.OldId = 0 Then
                    imageDictID = RasterImageDef.CreateImageDictionary(db)
                End If
                Dim rasterImageDef__1 As New RasterImageDef()
                Dim imageDict As DBDictionary = CType(tm.GetObject(imageDictID, OpenMode.ForWrite), DBDictionary)
                Dim rasterImageDefID As ObjectId
                If imageDict.Contains(bname) Then
                    rasterImageDefID = imageDict.GetAt(bname)
                    rasterImageDef__1 = CType(tm.GetObject(rasterImageDefID, OpenMode.ForWrite), RasterImageDef)
                Else
                    rasterImageDefID = imageDict.SetAt(bname, rasterImageDef__1)
                    rasterImageDef__1.SourceFileName = fname
                    rasterImageDef__1.Load()
                    rasterImageDef__1.ImageModified = True
                    rasterImageDef__1.ResolutionUnits = Unit.Millimeter
                    tm.AddNewlyCreatedDBObject(rasterImageDef__1, True)
                End If
                Dim rasterImage As New RasterImage()
                rasterImage.ImageDefId = rasterImageDef__1.ObjectId
                rasterImage.Orientation = New CoordinateSystem3d(pt, New Vector3d(xx, 0, 0), New Vector3d(0, yy, 0))
                rasterImage.Rotation = (rot * pi) / 180
                Dim bt As BlockTable = CType(tm.GetObject(doc.Database.BlockTableId, OpenMode.ForRead, False), BlockTable)
                Dim btr As BlockTableRecord = CType(tm.GetObject(bt(BlockTableRecord.ModelSpace), OpenMode.ForWrite, False), BlockTableRecord)
                btr.AppendEntity(rasterImage)
                tm.AddNewlyCreatedDBObject(rasterImage, True)
                tm.Commit()
                tm.Dispose()
            Catch e As System.Exception
                System.Windows.Forms.MessageBox.Show(e.ToString())
            End Try
        End Using
    End Using
End Sub

ThisDrawing.ModelSpace.AddRaster(ImageFileName, InsertPoint, ScaleFactor, RotAngle)