A complete guide how to compile TEXworks is far beyond the scope of this manual. However, most users should find precompiled versions suitable for their system come either with their TEX distribution or their operating system. If this is not the case, several precompiled versions can also be downloaded from http://code.google.com/p/texworks/downloads/list.
Compiling TEXworks yourself is only necessary if your system is not (yet) supported, if you want to always have the latest features (and bugs), or generally want to help in improving TEXworks further. To this end, there are some documents giving detailed instructions to compile TEXworks on different machines.