Winuser.h is part of the Microsoft Visual C++ (VC++) development environment. The tool defines several elements that developers use when they write programs to run on Windows platforms. The file is added, or included, in the project the developer is writing and therefore gives the developer access to the data in the file (similar to an include—.inc—file in an Active Server Pages—ASP—application). The VC++ development platform installs 0several such files. If you have access to a machine with the VC++ development program installed, you can open any of these files in Microsoft Notepad or in the development environment and view the contents. The data in Figure 8 was taken directly from this file.