GDI Information Services
GDI provides several services a driver can use to query the system about device and system attributes, a file's time stamp, and the performance counter. These services are listed in the following table.
Allows the driver to query the system about particular attributes of the device.
Returns the time stamp of a file.
Queries the local time.
Queries the performance counter.
Queries the frequency of the performance counter.
Queries processor or system-specific capabilities.