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About Plug and Play Components
November 2009 398
displayed, and it instead signals the process level event. The
configuration tool (upon getting unblocked because the event got
signaled rather than timing out) resets the timer and waits for the
event again. This process continues until the co-installer does not
signal anymore; finally, the configuration tool waiting for the event
times out and then launches the functional user interface.
The configuration tool in the timer mode provides a
Launch Now
button that immediately launches the main application to deal with
problems such as:
The user might cancel the Found New Hardware Wizard and the
co-installer might not get invoked.
Or 60 seconds might be too long for the user to wait.
About the Device Property Page
The device property pages are dynamic-link libraries (DLLs) that
work in conjunction with the Device Manager. They typically display
property sheets for examining and modifying the settings and
configuration of a device. The Device Manager provides a default
property page that gives access to typical device properties. The
Device Manager also gives the property page provider an
opportunity to add a custom property page. The custom provider
must be registered in order for the Device Manager to use it.