(As you know, in the use program of Windows Mobile, we can use the analog key VK to simulate some hardware key functions, such as calling today's screen, determining the keyboard, turning off the device, turning on the speaker, etc. (For details, please refer to Huang Jidong's post: talk about the analog key operation on Windows Mobile again). In some cases, we need to know which hardware button the user is pressing, and rewrite the function of the hardware button (such as a game program). The hardware button corresponds to a specific value, which can be used to identify. In. NETCF)