VB.NET读取IStream接口数据，数据结构：PDF文件流结构

[andwdz]

Imports System.Runtime.InteropServices.ComTypes
Imports System.IO

Public Class Form1

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim istr As IStream = Nothing
Dim str As Stream = Nothing
Dim ptr As IntPtr = 0
istr = AxFoxitReaderSDK1.SaveToStream '传出带PDF格式的IStream接口
istr.Seek(0, SeekOrigin.Current, ptr) '设置指针
'怎样把 Dim istr As IStream接口的PDF的流数据读出来放到 Dim str As Stream中，请高手指点下。

End Sub
End Class

[兔子-顾问]

https://developers.foxitsoftware.com/kb/article/developer-guide-foxit-pdf-sdk-net 看不明白再说，看看先。

[andwdz]

我只能看得懂简单的，没有VB.net代码说明?能大致说下方法吗

[andwdz]

我是想用VB.NET 读出IStream接口数据写入byte数组就可以了，我是菜鸟，但深的东东不太懂。