Setting up the environment on windows

Many customers have issues getting the environment set up correctly when creating Qt projects using Visual Studio on Windows. It should be documented somewhere that when using the binary package on Windows, then using the command prompt provided with Qt in the Start menu sets the environment up correctly for them. If they choose not to use this command prompt then they need to ensure that the environment is set up properly themselves, for example by using the command prompt provided with the relevant version of Visual Studio and adding QTDIR/bin to the PATH.