You can do one thing. Write the data of your DGV to a CSV (comma separated value) file. Whenever a user opens a CSV (on a machine having MS-Office) it will get open in MS-Excel by default. Here's a raw code snippet for each row in DGV get value of cell and store it in string append , (i.e. comma) end for trim last character of string //(because it would contain last appended comma) write this string to file "file.csv" save the file Whenever user open this CSV it will get open in MS-Excel. If a user does not have MS-Excel he/she may do one thing. Right click the file and open it in notepad. Hope this help you out.

Hello This error generally occurs when custom action fails to perform its action with "Elevated Privileges" on Vista (which is a normal case). The solution is NoImpersonate.js but you are saying that it couldn't solve the problem. So can you tell me when exactly this message box appeared? I mean as soon as you ran exe or after completion of the "install" event i.e after welcome message window? One more thing. Have you used installer class to override custom action? Also are you passing the "Property" (i.e. value) consisting of Ok or Cancel to custom action? "Savedstate" and "idictionary" is used to do it.