Amazon Product Advertising API - GUI with one function call

I need a program written using the Amazon Product Advertising API. This is fairly simple one function call program that simply processes an input text file and then returns an output text file. It will need the following: * A windows style GUI interface <!-- --> * Enter an input text file <!-- --> * Make one function call, process the input text file and parse the returned XML data <!-- --> * Display a progress bar while processing <!-- --> * Create an output text file <!-- --> * Handle 3-4 error scenarios <!-- --> * Create any necessary output error files <!-- --> * Some basic display items (how many records were processed, how many errors, etc...) I will provide more specific details to you later, but that is the basic premise. You may use any development language you choose. A final note, Amazon now **requires** an Associate ID in order to make any Product Advertising API calls. This is **different** from the older key and secret key requirements. So you **must** have access to an Associate ID or you cannot make any calls and cannot develop. Thank you!