How to convert between an IntPtr and a byte[]?

[Dave]

We are writing some code to interface to a DLL. The DLL
has a callback method that returns the address of a byte
buffer and the buffer length. I have defined the byte
pointer as an IntPtr.

How do I convert between the IntPtr and my managed byte[]
that I want to copy the data into???

-dave

 

[Michel Gallant]

Better asked in microsoft.public.dotnet.framework.interop, but:

Use the Marshal methods:

IntPtr pData = ....
byte[] buffdata = new byte[size];
Marshal.Copy(pData, buffdata, 0, size);


Note that it is often easier to proto-type with a [In, Out] byte[] data
then using an IntPtr.

- Michel Gallant
MVP Security