如何从单独的线程调用事件处理程序而不是创建它？

I'm having some trouble getting a web-page indexing program to work. I have a form that automatically downloads URLs to index from a database server and sends back responses containing the indexed page information, over UDP. I have a static class called UDP that keeps track of incoming and outgoing messages. There is an event that fires whenever a message is recieved, which the form that contains all the indexing code hooks to keep track of messages sent from a program on the server that holds the database of urls to index.I'm having some trouble getting a web-page inde