Hello,

I posted this question already, but in the wrong newsgroup... so here again:

I have a COM interface which has the following method:
HRESULT Item(
 [in] DWORD dwIndex,
 [in] DWORD dwWhichName,
 [in] DWORD cchLength,
 [out,size_is(cchLength)] LPSTR pszName
);

When I create a Wrapper-Dll with midl.exe and tlbimp.exe, this method is
converted to:

public void Item ( System.UInt32 dwIndex , System.UInt32 dwWhichName ,
System.UInt32 cchLength , System.String pszName )

pszName is supposed to be a buffer, so obviously, this won't work. I've
already decompiled the dll I generated with ildasm, the result is this:

.method public hidebysig newslot abstract virtual
           instance void  Item([in] unsigned int32 dwIndex,
                               [in] unsigned int32 dwWhichName,
                               [in] unsigned int32 cchLength,
                               [out] string  marshal( lpstr) pszName)
runtime managed internalcall

My question is: How do I need to modify this so that pszName becomes a
buffer that can be filled by the called method?

Some time ago I read something about using a StringBuilder... but I lost the
link.

Any ideas?

Greetings,
Henning Krause [MVP - Exchange]
==========================
Visit my website: http://www.infinitec.de
Try my free Exchange Explorer: Mistaya
(http://www.infinitec.de/software/mistaya.aspx)