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.NET Forum / .NET Framework / Interop / September 2005

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Marshal union struct from C callback

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Simon - 21 Sep 2005 18:32 GMT
Hey guys,

I'm wrapping a C lib in C#. The C lib has a callback which I pass a C#
delegate, which passes me a struct, but the struct has fields in it that are
unions.

I'm having a hard time marshalling this.

Here is what the C struct looks like and how I have declared my version in
C#. I would greatly appreciate if anyone could tell me what I've done wrong.

http://pastebin.ca/23534

Thanks in advance!
Mattias Sjögren - 21 Sep 2005 19:31 GMT
Simon,

>I'm having a hard time marshalling this.
>
>Here is what the C struct looks like and how I have declared my version in
>C#.

Looks good.

>I would greatly appreciate if anyone could tell me what I've done wrong.

What tells you something's wrong? I assume you get some kind of error
or unexpected behavior.

Whether or not your declaration will work as expected depends on what
all the nested structs contain.

Mattias

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Mattias Sjögren [MVP]  mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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