[jeromesalimao]

Microsoft VSTO can be used to build office addins and extensions. Meaning you can code in any CLR language. C#, VB, C++ presumably.

"Microsoft Visual Basic for Applications (VBA) uses unmanaged code that is tightly integrated with Office applications. Microsoft Office projects created by using Visual Studio enable you to take advantage of the .NET Framework and Visual Studio design tools."

- http://msdn.microsoft.com/library/vstudio/ss11825b.aspx - http://msdn.microsoft.com/library/vstudio/bb386107.aspx - http://msdn.microsoft.com/en-us/office/hh133430.aspx

Probably worth a look. I worked at an iBank previously and we were investigating when/how we could start using VSTO more..