combobox column fill with items from excel

There are 3 ways:
1) using OleDb objects and DataSource[^] property,
2) using Excel.Interop,
3) using CreateObject() function.

Reading and Writing Excel using OLEDB[^]
http://blog.themobilebrand.com/technology/c/reading-an-excel-workbook-using-c-and-oledb/[^]
http://forums.asp.net/t/1255191.aspx/1[^]
http://csharp.net-informations.com/excel/csharp-excel-tutorial.htm[^]
http://social.msdn.microsoft.com/Forums/en-US/vsto/thread/b6e8a28c-6760-4e86-a1aa-e2ce9ec36380/[^]
http://stackoverflow.com/questions/657131/how-to-read-data-of-an-excel-file-using-c[^]

Other resources:
http://exceldatareader.codeplex.com/[^]