## Virtual Device Driver Reference for OS/2

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### VDHQuerySysValue

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    Format
    Parameters
    Return Codes
    Purpose
    Glossary

This function queries a system value.

    #include mvdm.h

    HVDM     VDMHandle;  /*  Index of the system variable handle of the DOS session */

    ULONG    Index;      /*  Index values */

    ULONG    rc;

    rc = VDHQuerySysValue(VDMHandle, Index);