## Pen for OS/2 Device Driver Reference

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### Query Unit Variables - Function 61h

Category 90h, Driver IOCtls - Query Unit Variables

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    Description
    Parameter Packet Format
    Data Packet Format
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    #define PEN_FUNC_QUV 0x061

This function gets the device-specific variable from the requested unit. Unit 0, variable 0, returns an error counter. Unit 0, variable 1, returns a panic flag word.