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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.
| Function | Description |
|---|---|
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. |