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Hi
I want to do something when a memory stick attached to PC. Now I use a timer and check it in every tick whether any memory stick is plugged(use DriveInfo or with querying WMI)
Is there any event driven model available to do? for example i use an event in my program that raise whenever a memory stick is plugged in to computer?
You want to handle the WM_DEVICECHANGE message in your wndproc. When you handle that, you can also call
RegisterDeviceNotificationto get notification that the stick is being cleanly ejected.When you recieve a
WM_DEVICECHANGE, you want to check the wParam –DBT_DEVICEARRIVAL(0x800) is what you’re looking for.In C++, you should have no trouble with the wndproc. In c#, you’ll want to override your main form’s WndProc method and check
m.Msg == 0x219andm.WParam == 0x800. Note that not ALL of these will be a memory stick – but you can use this to notify you to check for drive insertion rather than a timer.