Sending Unique Messages From one VB App To Another

Demonstrates how to communicate between your applications by sending your own windows messages along with your own variable. Properly commented code. I couldn't find a similar program on PSC, so I thought I'd write this up. Hope someone finds this useful. The code includes 2 projects, 'a client' and a 'server'. Using the RegisterWindowMessage API the server creates a unique windows message, then through the FindWindow API it checks to see if the 'client' is running. If it is, it sends a message using SendMessageLong. The client is subclassed and adds any messages it detects to a listbox. The code is well commented, full explaining subclassing, the API's it uses and why, so even a notice should be able to understand all this.