It depends on what do you mean on "Powerful".

Each language has pros and cons. If you are choosing among these language /
tool, please specify your environment / purpose / hardware / software / user
requirements....

" wrote:

1. XLL SDK;
2. Shared Add-in (COM add-in)
3. Excel Add-in (C# VSTO)
4. Excel Workbook (C#)
5. Excel Template
6. VBA

and advatages and disadvatages?

I personal think C# is depend on .NET Framework 3.5, so it's not good for me
,but I also want to know it's advatages compare with other type Excel
application.