It’s very simple to use Microsoft Excel add excel borders. First, launch your MS Excel and choose the excel file you want to work with and open it. Find out the area in the spreadsheet that you want to have borders. Drag your mouse over the cells in the area and righ click to open options window. Now, select Format Cells ->Border and several options will appear on another new window. In the “Style” box, you can choose the border design as you like by cliking the line type. You can add different borders in different areas of the spreadsheet to see what suits your need. From the “Color” drop down menu, you can select any color you want to change the color of your borders.
article from:
http://www.e-iceblue.com/Knowledgebase/Spire.XLS/Program-Guide/how-to-use-csharp-or-vbnet-to-add-excel-borders.html
Can anyone tell me how to Use C#/VB.NET add excel borders?