CDCLASS - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _WINSTA_H

typedef enum _CDCLASS
{
    CdNone, // No connection driver.
    CdModem, // Connection driver is a modem.
    CdClass_Maximum,
} CDCLASS;

#endif

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This type is documented in the [MS-TSTS] specification.