VB.Net to COM Marshalling

  • Thread starter Thread starter Guest
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G

Guest

I am using a COM interface decalared as follows from VB.Net

interface ISample : IDispatch
{
[id(1), helpstring("method WriteSample")] HRESULT Write(long* pBuffer )
}

In VB.Net, I get the address from the call below and pass it to the "Write"
function which is declared as

Write( Byref pBuffer as Integer )

.....
Dim ptrBuffer As Integer = playbackArrayHandle.AddrOfPinnedObject.ToInt32
obj.Write( ptrBuffer )

However, the COM object receives the pointer as a long** or a
pointer-to-pointer to a long. How can I fix this?

Thanks
Hemal
 
However, the COM object receives the pointer as a long** or a
pointer-to-pointer to a long. How can I fix this?
Click to expand...

Don't use any GCHandle, just pass in the Integer value you want
directly.



Mattias
 
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