With the file "usertype.dat" you can define your own keywords, which will be displayed in color by the Microsoft C++ IDE. The usertype.dat is a simple text file which must be stored in the same directory as the msdev.exe. With this trick a simple spellchecker can be created since all typical classes, types, defines, functions and methods are displayed in a diffrent color. You can configure the color in the IDE (I recommend dark grey). As a starting point I will now show you the contents of my "usertype.dat":