Hi there,\n\nI'm a very experienced C++ developer but a relative newcomer to web \ndevelopment and a raw neophyte in the ASP.NET arena. I have a very simple \nscenario that hopefully someone can help me with. I have a 3rd-party HTML \nform with a single (submit) button and a number of (static) hidden fields \n(all values hardcoded). The form is pure HTML (no ASP or ASP.NET whatsoever) \nand it simply posts its data to a 3rd-party site when the button is clicked \n(i.e., the form's "action" attribute is set to the appropriate URL \naccordingly). This site then reads its data from the hidden fields on the \nform. I now want to re-write this form using ASP.NET but I'll add a single \ndropdown list. The form should then get posted back to my own server instead \nwhere I can now set (or dynamically create) these hidden fields based on the \nusers' selected dropdown value. I then want to post the form back to the \noriginal 3rd-party site just like the original form handled it (but the \nhidden fields were now filled in by my server - they're no longer \nhardcoded). I can wire up the submit button's event handler in ASP.NET and \ncheck the dropdown list but I'm not sure what code I should be calling to \ndynamically create these hidden fields and then post the form to its \noriginal 3rd-party site. Can anyone show me the basic code to get me \nstarted. Thanks very much.