InfoPath Dev

I am using the code below to change the location of a Secondary data connection. This works fine but if the file does not exist, the FileQueryConnection.Execute() method generates an error of its own regardless of the Try block. I would like to avoid this error (confuses the users) by checking for the...

I begin with InfoPath and I would like to know ( in code) how to send data form form "submit" using click the command button? How to link key example F5 in clic button command? infopath 2007 and Vb or C# Please help me!