COM Interop between 32 bit and 64 bit applications

Posted by rip on Stack Overflow See other posts from Stack Overflow or by rip
Published on 2010-04-08T05:28:31Z Indexed on 2010/04/08 5:33 UTC
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I have a .NET windows forms application compiled as x84 – it needs to be compiled as x84 because it references 3rd party DLLs which are 32 bit. The application uses COM interop to automate Office applications and also AutoCAD. My question is: will my COM interop code work okay on a 64 bit operating system against the 64 bit versions of Office and AutoCAD? I’m going to try this out but I wondered whether someone knew of any problems?

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