Visual C++ 6.0 (commonly known as VC6), which included MFC 6.0, was released in 1998. The release was somewhat controversial since it did not include an expected update to MFC. Visual C++ 6.0 is still quite popular and often used to maintain legacy projects. There are, however, issues with this version under Windows XP, especially under the debugging mode (for example, the values of static variables do not display). The debugging issues can be solved with a patch called the "Visual C++ 6.0 Processor Pack".