_VPOWERD_Set_System_Power_State

POWERRET _VPOWERD_Set_System_Power_State(POWER_STATE Power_State, 
    DWORD Request_Type);
 

Sets system power state to low- or no-power state. If a low-power state is set, this service returns successfully after power is restored. If a no-power state, this service never returns and the system loses all power.

• Returns PR_SUCCESS if successful,or one of the error values beginning with PR_ listed in VPOWERD.H.

Power_State

Power state for the device. Can be one of these values:

PSTATE_STANDBY (0x0001)	Standby
PSTATE_SUSPEND (0x0002)	Suspended
PSTATE_OFF (0x0003)	Off

All other values are reserved.

Request_Type

Type of request. Can be one of these values:

REQTYPE_USER_INITIATED (0x00000000)	Request is User-initiated.
REQTYPE_TIMER_INITIATED (0x00000001)	Request is Timer-initiated.
REQTYPE_FORCED_REQUEST (0x00000002)	Force acceptance of request.
REQTYPE_BIOS_CRITICAL_SUSPEND (0x00000004)	Request is BIOS Critical Suspend.

Windows 95 does not support the APM 1.1 OEM-defined system states.