How to kill an unmanaged message box call from a service

I have a service that makes a c开发者_运维知识库all to an unmanaged dll. On a certain code path, it will open a message box. Since it's a service, there's no actual window that shows up, but the thread is still blocked.

How do I kill that message box automatically?

Actually the message box is displayed, but not on the interactive window stations and thus isn't visible to any logged on user. You have a few options:

• You can make the service interactive. This will allow it to show a message box to the user currently logged on. MSDN has some information about interactive services.

• You can hook the MessageBox export and redirect it to your own code. This can be done using low level Windows API functions.