PROCESS_DEVICEMAP_INFORMATION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTPSAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The PROCESS_DEVICEMAP_INFORMATION structure contains information about a process's device map.
 */
typedef struct _PROCESS_DEVICEMAP_INFORMATION
{
    union
    {
        struct
        {
            HANDLE DirectoryHandle; // A handle to a directory object that can be set as the new device map for the process. This handle must have DIRECTORY_TRAVERSE access.
        } Set;
        struct
        {
            ULONG DriveMap;         // A bitmask that indicates which drive letters are currently in use in the process's device map.
            UCHAR DriveType[32];    // A value that indicates the type of each drive (e.g., local disk, network drive, etc.). // DRIVE_* WinBase.h
        } Query;
    };
} PROCESS_DEVICEMAP_INFORMATION, *PPROCESS_DEVICEMAP_INFORMATION;

#endif
#endif

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This structure defines information about the process's DOS devices map.

Applicable to

Members

Set

DirectoryHandle

A handle to a directory object to set as the new device map for the process. The handle must grant DIRECTORY_TRAVERSE access.

See also

Query

DriveMap

A bit mask defining which drive letters are currently in use in the process's device map. Bit 0 corresponds to A:, bit 1 to B:, and so on.

DriveType

An array where each element defines the type of the drive associated with the specified letter. The value is meaningful only when the corresponding bit set in the DriveMap field.

Known values

The possible values are defined in SDK in WinBase.h:

See also