Application.SetSuspendState Method (System.Windows.Forms)

SetSuspendState Method

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Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

.NET Framework Class Library

Application..::.SetSuspendState Method

Suspends or hibernates the system, or requests that the system be suspended or hibernated.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)

Syntax

Visual Basic

Public Shared Function SetSuspendState ( _
    state As PowerState, _
    force As Boolean, _
    disableWakeEvent As Boolean _
) As Boolean

public static bool SetSuspendState(
    PowerState state,
    bool force,
    bool disableWakeEvent
)

Visual C++

public:
static bool SetSuspendState(
    PowerState state, 
    bool force, 
    bool disableWakeEvent
)

static member SetSuspendState : 
        state:PowerState * 
        force:bool * 
        disableWakeEvent:bool -> bool

Parameters

state: Type: System.Windows.Forms..::.PowerState
A PowerState indicating the power activity mode to which to transition.

force: Type: System..::.Boolean
true to force the suspended mode immediately; false to cause Windows to send a suspend request to every application.

disableWakeEvent: Type: System..::.Boolean
true to disable restoring the system's power status to active on a wake event, false to enable restoring the system's power status to active on a wake event.

Return Value

Type: System..::.Boolean
true if the system is being suspended, otherwise, false.

Remarks

If an application does not respond to a suspend request within 20 seconds, Windows determines that it is in a non-responsive state, and that the application can either be put to sleep or terminated. Once an application responds to a suspend request, however, it can take whatever time it needs to clean up resources and shut down active processes.

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

Application Class

System.Windows.Forms Namespace

PowerState

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Flag as ContentBug

Screen not swtiching on when using PowerState.Suspend in this Method

bart___s | Edit | Show History

I have an application that uses SetWakeupTime to wakeup at a specific time. After setting this wakeup time, I use
Application.SetSuspendState(PowerState.Suspend, false, false); to sleep the PC. When the PC wakes up (I can see the lights
turining on at the correct time), the monitor is not switched on. If I wakeup because of mousemove or keyboard press
the monitor does switch on.

I can change to Hibernating Application.SetSuspendState(PowerState.Hibernate, false, false); and that works for the screen,
but then I get the ugly bios boot screen and the resume windows screen.

How to use the first option AND get the monitor on after waking up ?