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The Microsoft windows runtime library, are required to run programs that were commonly written with Visual Basic 6 or visual c++. It can be difficult to know whether a program needs these files because often an author fails to mention it in the help files or documentation. Typically the way you find out is that you run the program and an error message appears ‘A required .DLL file was not found’.

Microsoft Visual Basic Runtime library
Applies to: Windows
Requirements: Windows

The current set of vb6 runtime library is Service Pack 6 (SP6) released in late March 2004 and it will run files written with VB 6 SP1 to SP6. This package includes msvbvm60.dll, oleaut32.dll, olepro32.dll and others. After you have downloaded the file, simply run it and the files will be copied to their correct location.

The Visual C++ 2008 runtime library
Applies to: Windows
Requirements: Windows

The Visual C++ 2008 SP1 runtime library, also called mfc90.dll runtime files, are required to run programs that were written in Visual C++ 2008. The latest set for Visual C++ 2008 is Service Pack 1 (SP1) - it was released in August 2008. This package installs runtime components of C Runtime (CRT), Standard C++, ATL, MFC, OpenMP and MSDIA libraries. After you have downloaded the file, simply run it and the files will be installed to their correct location.