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Sample Download : http://code.msdn.microsoft.com/VBRegisterHotkey-50af3179 

The sample demonstrates how to register and unregister a hotkey for the current application.

User32.dll contains 2 extern method RegisterHotKey and UnregisterHotKey to define or free a system-wide hot key. The method Application.AddMessageFilter is used to add a message filter to monitor Windows messages as they are routed to their destinations. Before a message is dispatched, the method PreFilterMessage could handle it.

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