cfix is an xUnit testing framework for C/C++, fully specialized for Win32 (32/64 bit) development. cfix requires only little effort to author unit tests, which are compiled and linked into a DLL. The testrunner application provided by cfix allows selectively running tests of one or more of such test-DLLs. Execution and behaviour in case of failing testcases can be highly customized. Moreover, cfix has been designed to work well in conjunction with the Windows Debuggers (Visual Studio, WinDBG). Licensed under the GNU Lesser Public License 3.0.