I started working with Visual studio 2005 and Visual Studio 2008. Note : You need to install Visual Studio before installing Crystal report. SAP Crystal Reports Web Services/XML Data Driver :- Used to support web-services and you can create reports using XML as data source.
A merge module is a set of components that are merged with a Windows installer for applications that needs. This Visual Studio 2012 guide shows how to install Visual Studio 2012 Ultimate edition step by step.