I need to send data in xml format to a server.

I have an application that gathers data in behalf of a customer.
NAME, ADDR, STATE, ZIP, and need to send this data to the customer.
The application is NOT web based.

the data will be sent to http://www.anywhere.com/sumurl/HTTPPost
the URL is listed is bogus, and the realone is owned by the customer.

I can create the customer XML file from the database collecting the information. I belive the XML would look like this...

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE CustomerRequests SYSTEM "D:\X\Customers.dtd">
<CustomerRequests>
    <CustomerID>Text</CustomerID>
    <FirstName>Text</FirstName>
    <MiddleInitial>Text</MiddleInitial>
    <LastName>Text</LastName>
    <Address1>Text</Address1>
    <City>Text</City>
    <State>Text</State>
    <ZipPostalCode>Text</ZipPostalCode>
</CustomerRequest>

I have a couple of questions..
1) What do I do with this file?
2) Do I even need to create this file?
3) How do I send these elements to the target server?
thanks
-an XML newbie...

what platform are you using? .NET? Java? VB? Something else?

I should have mentioned that the platform is .NET.

Window's boxes take record the data to a local drive, then need to send the data in the XML format to a URL.

thanks