New to Autoit

[raghavendrapoduri]

Hello buddies

I am very new to Autoit Scripting language.I want to Automate my manual testing to Automate.I found Autoit is Basic tool.I took first step to automate my test cases.And i am going Autoit function reference.In that i found Excel management. And try to open the excel.But i am confucsed between Excel open function and Excel book open function.What is workbook and terminology.Any suggestion to start the task and how to go ahead 

[water]

Welcome to AutoIt and the forum!

There are a lot of sites in the Internet explaining basic Excel concepts like this one: http://www.tutorialspoint.com/listtutorials/ms-excel/basic-concepts/1

_Excel_Open is used to start the Excel application or to connect to a running Excel instance
_Excel_BookOpen is used to open an Excel file (the workbook) which contains 1 or multiple worksheets (the pages)