#ifndef _NTIOAPI_H
/**
* The FILE_MAILSLOT_SET_INFORMATION structure is used to set a value on a mailslot.
*
* \remarks https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/ns-ntifs-_file_mailslot_set_information
*/
typedef struct _FILE_MAILSLOT_SET_INFORMATION
{
PLARGE_INTEGER ReadTimeout; // The time, in milliseconds, that a read operation can wait for a message to be written to the mailslot before a time-out occurs.
} FILE_MAILSLOT_SET_INFORMATION, *PFILE_MAILSLOT_SET_INFORMATION;
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This structure is documented in Windows Driver Kit.