FLOWCONTROLCLASS - NtDoc

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

/**
 * The FLOWCONTROLCLASS enumeration specifies the flow-control mode for an asynchronous transport.
 */
typedef enum _FLOWCONTROLCLASS
{
    FlowControl_None,
    FlowControl_Hardware,
    FlowControl_Software
} FLOWCONTROLCLASS;

#endif

View code on GitHub

NtDoc

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