Hi everyone,

I'm attempting to rewrite an ATL component in .NET. The only part of the
functionality i'm having problems with is a particular method that needs to
write to a passed IStream.

My calling application is written in using MFC. I've attempted in my new
c#.net component to accept a System.Runtime.InteropServices.ComTypes.IStream
as a parameter, but the MFC application compains saying it can't convert an
IStream to a System.Runtime.InteropServices.ComTypes.IStream. I know it's
got to be more complicated than what i've already tried, but has anyone got
any pointers?

for info I'm using C# .NET 2.0

thanks,
Andrew

Thanks Mattias,

Yes, I am referencing the assembly directly. Since reading your post i've
tried using regasm.exe to register the .net assembly and create a .tlb file.
The dll registered fine, then in my MFC application I added a COM reference
to the dll but I get a message

"Type library 'X' was exported from a CLR assembly and cannot be re-imported
as a CLR assembly."

Given that I was attempting to import the COM types rather than the .NET
reference directly, I don't really understand what the message means.

thanks for your help,
Andrew

"Mattias Sjögren" <mattias.dont.want.spam (AT) mvps (DOT) org> wrote

I sorted the error I was seeing by not adding a reference to the tlb but by
using the syntax:
#import "libid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

but I think it would also have work if I'd used a private copy of the tlb
and dll in the build directory and then used #import "myDLL.tlb"

this approach seems to suit me much better than directly importing the .NET
assembly as a reference.

I'll respond again once I completely solve my IStream problem

thanks,
Andrew



"Andrew Brook" <ykoorb (AT) hotmail (DOT) com> wrote