Installing OMNeT++ :
1- Download the OMNeT++ file omnetpp-4.6-src-windows.zip.
2- Copy the OMNeT++ archive to the directory C://
3- Open the OMNetpp-4.6 file
4- Start mingwenv.cmd in the omnetpp-4.6 file.
5- enter the following commands:
$ ./configure
$ make
6- wait until it's done.
7- Type "omnetpp" to start the IDE
omnetpp.exe program in the omnetpp-4.6/ide directory in Windows Explorer, rightclick
it, and choose Send To > Desktop (create shortcut) from the menu.