I use ExcelLibrary which can be downloaded from Google code License is GNU LGPL.

The thing is i'm not an expert on C#, and here's an image to show u how i want the program to function [image: prog.jpg] You can notice the checkboxes so, if only check box of ID is cheked then when i click to EXPORT TO EXCEL only the column of ID will exported.

sorry i've solved the issue, my database wasn't recogniced like suposed to be thanks anyways :D!