i want to create an excel AddIn .it is simple :
File>New Project > Visual Basic > Office > Version 2010>OK
but an error says "Object reference not set to an inctance of an object"!
my VS version is 2010 ultimate with Office 2010
in addition , i downloaded these two files and inistalled them hope they help me but it makes no change for me
http://www.microsoft.com/download/en/confirmation.aspx?id=3508
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=20479
what is wrong and what is the solution?
thanks in advance