The core of this challenge is handling the KeyDown event. In Windows Forms, standard controls don't always catch function keys unless the form is set up to handle them.
If your download does not include the .exe , it is likely because it must be requested separately from the developers to ensure you have the latest authorized version.
F1 Challenge VB mod, there is no single "universal" password or code. Accessing the mod's features typically requires a unique Password Installer file or code provided directly by the mod authors. How to Get the Password
The password system is often mistaken for high-level encryption, but it is actually a or a simple password-protected archive.