Ohh, sorry. I forgot to mention the Visual Studio version I am using: VS2008. I've already tried to use the "Just My Code" feature, but as you've said, it just works for managed code and I'm programming in pure C++ unmanaged. Thanks anyways! Julian

Hello people, I've been searching this forum, Google and Visual Studio's help but didn't find anything related. I'm developing in Visual Studio C++ and during debug process when stepping into one function which uses a "wstring" type variable, the VC++ debugger always steps into "xstring" system source file before. This is annoying since I don't need to debug this file. I could find an option in "Debug Source Files" property of the Solution called "Do not look for these source files" and added the string "$(VCInstallDir)crt\src\xstring" but it didn't work at all. Does anyone have a clue? Thanks Julián