Description:You're looking at a .MRB file and wondering, 'Why doesn't Microsoft document this stuff?' You're reaching for the phone. STOP! Read Windows Undocumented File Formats instead - we give you all the information you need to tackle the most common Windows fileOptimize files and improve your programs with this no-holds-barred look at: .MRB, .SHG, .HLP, .ANN, .BMK, COMPRESS.EXE, EXPAND.EXE, & LZEXPAND.DLL files among many others