how to open excel 2007 and interact with it using vc++ code
 

I am a vc++ programmar . Earlier i interacted with excel 2000 APIs and
objects using vc++ 6.0 code . Now i want to use Excel 2007 . But in excel
2007 they changed everything . They removed worksheet , worksheets , Range
class etc . Now i am trying to open excel file using my code . But i could
not get the IDispatch pointer of workbooks . If anybody know the answer ,
help me..