C# - System-Wide, Global Keyboard Shortcuts

We require a simple project Visual Studio Windows Form project to be created to demonstrate how to create/register a global, system wide keyboard-shortcut. For example - we have developed a telephone messaging application. We need a keyboard sequence to trigger a specific WinForm to be displayed to the user and activated so that the user can proceed in data-entry for the new phone message. Experienced C# coders only with a simple solution to this simple problem.