Setting up the IDE
QUOTE
To use the engine, we will have to include the header file <irrlicht.h>, which can be found in the Irrlicht Engine SDK directory \include. To let the compiler find this header file, the directory where it is located should be specified somewhere. This is different for every IDE and compiler. I will explain how to do this in Microsoft Visual Studio C++ 6.0 and .NET:
If you use Version 6.0, select the Menu Extras -> Options. Select the directories tab, and select the 'Include' Item in the combo box. Add the \include directory of the Irrlicht Engine folder to the list of directories. Now the compiler will find the Irrlicht.h header file. We also need the location of irrlicht.lib to be listed, so select the 'Libraries' tab and add the \lib\VisualStudio directory.