Space Fill Addin / Macro for VS2008

Question

I am looking for a way to fill in the blanks when naming test functions. I have seen this demo'd at a few Test Driven Presentations. Can some point me to an addin or let me know how i can create such macro in Visual Studio 2008

[TestMethod]
void test login page with failed user(){...}

to

[TestMethod]
void test_login_page_with_failed_user(){...}