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dotnet-desktop-guide/framework/winforms/advanced/power-management-in-windows-forms.md

@@ -0,0 +1,34 @@
+---
+title: "Power Management"
+ms.date: "03/30/2017"
+dev_langs: 
+  - "csharp"
+  - "vb"
+helpviewer_keywords: 
+  - "battery states"
+  - "power states"
+ms.assetid: ad04a801-5682-4d88-92c5-26eb9cdb209a
+---
+# Power Management in Windows Forms
+Your Windows Forms applications can take advantage of the power management features in the Windows operating system. Your applications can monitor the power status of a computer and take action when a status change occurs. For example, if your application is running on a portable computer, you might want to disable certain features in your application when the computer's battery charge falls under a certain level.  
+  
+ The .NET Framework provides a <xref:Microsoft.Win32.SystemEvents.PowerModeChanged> event that occurs whenever there is a change in power status, such as when a user suspends or resumes the operating system, or when the AC power status or battery status changes. The <xref:System.Windows.Forms.SystemInformation.PowerStatus%2A> property of the <xref:System.Windows.Forms.SystemInformation> class can be used to query for the current status, as shown in the following code example.  
+  
+ [!code-csharp[PowerMode#1](~/samples/snippets/csharp/VS_Snippets_Winforms/powermode/cs/form1.cs#1)]
+ [!code-vb[PowerMode#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/powermode/vb/form1.vb#1)]  
+  
+ Besides the <xref:System.Windows.Forms.BatteryChargeStatus> enumerations, the <xref:System.Windows.Forms.SystemInformation.PowerStatus%2A> property also contains enumerations for determining battery capacity (<xref:System.Windows.Forms.PowerStatus.BatteryFullLifetime%2A>) and battery charge percentage (<xref:System.Windows.Forms.PowerStatus.BatteryLifePercent%2A>, <xref:System.Windows.Forms.PowerStatus.BatteryLifeRemaining%2A>).  
+  
+ You can use the <xref:System.Windows.Forms.Application.SetSuspendState%2A> method of the <xref:System.Windows.Forms.Application> to put a computer into hibernation or suspend mode. If the `force` argument is set to `false`, the operating system will broadcast an event to all applications requesting permission to suspend. If the `disableWakeEvent` argument is set to `true`, the operating system disables all wake events.  
+  
+ The following code example demonstrates how to put a computer into hibernation.  
+  
+ [!code-csharp[PowerMode#2](~/samples/snippets/csharp/VS_Snippets_Winforms/powermode/cs/form1.cs#2)]
+ [!code-vb[PowerMode#2](~/samples/snippets/visualbasic/VS_Snippets_Winforms/powermode/vb/form1.vb#2)]  
+  
+## See also
+
+- <xref:Microsoft.Win32.SystemEvents.PowerModeChanged>
+- <xref:System.Windows.Forms.SystemInformation.PowerStatus%2A>
+- <xref:System.Windows.Forms.Application.SetSuspendState%2A>
+- <xref:Microsoft.Win32.SystemEvents.SessionSwitch>