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Do we really need to throw exceptions for P / Invoke methods?

I am using P / Invoke methods in my .NET application. Since functions are C ++ functions; they each have a return type such as int, intptr, or any structure. The return type is enough to tell me if the function was successful or not. Should I still be catching the generic or COM exception in this case?

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C ++ functions can throw exceptions.

The Windows API can throw exceptions, whether they are thrown directly from P / Invoke or from C ++ functions.



Is it possible for your users to see exception messages (error messages) from Windows or do you want your program to display your message?

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The PInvoke call may still fail if the Dll is not found or does not contain the required function.



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In my opinion, you should always use try / catch when calling an external component. You never know what to return. Prepare for the unexpected :)

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