How can I associate dll files with nunit-x86.exe (instead of nunit.exe)?

I am working on a VISTA (x64) system.

My problem: Double clicking x86 .dll file does not start nunit-x86.exe

Background: My build creates example.dll (x86) with nunit tests.

WORKING Workflow: * Start nunit-x86.exe * DLL file is loaded, GUI is showing and running tests, everything o.k.

FAILING Workflow: * Double click example.dll, FAILS

I do not describe the error message here, because I already know, that this error is caused by the fact, that double clicking the .dll starts "nunit.exe".

The context menu ("Open with") dialog allows me to "Browse" to "nunit-x86.exe" and select it, but this does not change the behaviour when double clicking example.dll.

Clarification: I browse to C:\Program Files (x86)\NUnit 2.5.3\bin\net-2.0\nunit-x86.exe开发者_Go百科

"assoc" and "ftype" neither show "dllfile" nor a "nunit" application anywhere. Since the context menu already shows me, that example.dll is associated by default to NUnit (I only see the Nunit bitmap), I do not want to use "assoc".

Can anybody explain, how to associate nunit-x86.exe to dll files (without using "assoc").

Best Regards Heinrich

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