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Posted 1 Jan 2010
Licenced CPOL

Task Manager

, 1 Jan 2010
Manage your daily tasks and To-Do list using some exciting features of Windows 7.
TaskManager
Core
AppRestartRecovery
Dialogs
Common
TaskDialogs
Interop
AppRestartRecovery
Dialogs
NetworkList
PowerManagement
TaskDialogs
NetworkList
PowerManagement
Properties
PropertySystem
SafeHandles
Shell
Common
CommonFileDialogs
Controls
Design
ShellObjects.cd
ShellThumbnailClassDiagram.cd
DesktopWindowManager
ExplorerBrowser
ExplorerBrowserDiagram.cd
Interop
Common
Dialogs
ExplorerBrowser
KnownFolders
PropertySystem
StockIcons
Taskbar
KnownFolders
Properties
PropertySystem
StockIcons
Taskbar
TaskManager
Common
Controls
Database
SqlTaskManager.edmx
TaskManager.mdf
TaskManager_log.LDF
Properties
Resources
Add.png
AddCategory.png
AddResource.png
AddTask.png
Back.ico
backcolor.bmp
BlueCat.png
Blue_Category.ico
bold.bmp
Category.png
Category_Icon.ico
Close.bmp
Close.png
color.bmp
Delete.png
Delete_01.png
Delete_Icon.ico
edit.png
edit_Icon.ico
Empty.png
Forward.ico
GanttChart.png
GreenCat.png
Green_Category.ico
High_Priority.png
High_Priority_Icon.ico
indent.bmp
italic.bmp
Low_Priority.png
Low_Priority_Icon.ico
Medium_Priority.png
Medium_Priority_Icon.ico
NextWeek_Flag.png
NextWeek_Flag_Icon.ico
NoDate_Flag.png
NoDate_Flag_Icon.ico
ol.bmp
OrangeCat.png
Orange_Category.ico
outdent.bmp
PurpleCat.png
Purple_Category.ico
Question.ico
Question_Icon.ico
RedCat.png
Red_Category.ico
Resource.png
Resource_Icon.ico
Save.bmp
Save.png
Task manager.ico
Task.png
TaskSetting.png
Task_Icon.ico
ThisWeek_Flag.png
ThisWeek_Flag_Icon.ico
Today_Flag.png
Today_Flag_Icon.ico
Tomorrow_Flag.png
Tomorrow_Flag_Icon.ico
underscore.bmp
uol.bmp
YellowCat.png
Yellow_Category.ico
TaskManager.csproj.user
Window7
TaskManagerSimple
TaskManagerSimple
Common
Controls
Database
SqlTaskManager.edmx
TaskManager.mdf
TaskManager_log.LDF
Properties
Resources
Add.png
AddCategory.png
AddResource.png
AddTask.png
Back.ico
backcolor.bmp
BlueCat.png
Blue_Category.ico
bold.bmp
Category.png
Category_Icon.ico
Close.bmp
Close.png
color.bmp
Delete.png
Delete_01.png
Delete_Icon.ico
edit.png
edit_Icon.ico
Empty.png
Forward.ico
GanttChart.png
GreenCat.png
Green_Category.ico
High_Priority.png
High_Priority_Icon.ico
indent.bmp
italic.bmp
Low_Priority.png
Low_Priority_Icon.ico
Medium_Priority.png
Medium_Priority_Icon.ico
NextWeek_Flag.png
NextWeek_Flag_Icon.ico
NoDate_Flag.png
NoDate_Flag_Icon.ico
ol.bmp
OrangeCat.png
Orange_Category.ico
outdent.bmp
PurpleCat.png
Purple_Category.ico
Question.ico
Question_Icon.ico
RedCat.png
Red_Category.ico
Resource.png
Resource_Icon.ico
Save.bmp
Save.png
Task manager.ico
Task.png
TaskSetting.png
Task_Icon.ico
ThisWeek_Flag.png
ThisWeek_Flag_Icon.ico
Today_Flag.png
Today_Flag_Icon.ico
Tomorrow_Flag.png
Tomorrow_Flag_Icon.ico
underscore.bmp
uol.bmp
YellowCat.png
Yellow_Category.ico
TaskManager.csproj.user
//Copyright (c) Microsoft Corporation.  All rights reserved.

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using MS.WindowsAPICodePack.Internal;

namespace Microsoft.WindowsAPICodePack.ApplicationServices
{
    internal static class Power
    {
        internal static PowerManagementNativeMethods.SystemPowerCapabilities 
            GetSystemPowerCapabilities()
        {
            IntPtr status = IntPtr.Zero;
            PowerManagementNativeMethods.SystemPowerCapabilities powerCap;

            try
            {
                status = Marshal.AllocCoTaskMem(
                Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities)));

                uint retval = PowerManagementNativeMethods.CallNtPowerInformation(
                  4,  // SystemPowerCapabilities
                  (IntPtr)null,
                  0,
                  status,
                  (UInt32)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities))
                  );

                if (retval == CoreNativeMethods.STATUS_ACCESS_DENIED)
                {
                    throw new UnauthorizedAccessException("The caller had insufficient access rights to get the system power capabilities.");
                }

                powerCap = (PowerManagementNativeMethods.SystemPowerCapabilities)Marshal.PtrToStructure(status, typeof(PowerManagementNativeMethods.SystemPowerCapabilities));
            }
            finally
            {
                Marshal.FreeCoTaskMem(status);
            }

            return powerCap;
        }

        internal static PowerManagementNativeMethods.SystemBatteryState GetSystemBatteryState()
        {
            IntPtr status = IntPtr.Zero;
            PowerManagementNativeMethods.SystemBatteryState batt_status;
        
            try
            {
                status = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState)));
                uint retval = PowerManagementNativeMethods.CallNtPowerInformation(
                  5,  // SystemBatteryState
                  (IntPtr)null,
                  0,
                  status,
                  (UInt32)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState))
                  );

                if (retval == CoreNativeMethods.STATUS_ACCESS_DENIED)
                {
                    throw new UnauthorizedAccessException("The caller had insufficient access rights to get the system battery state.");
                }

                batt_status = (PowerManagementNativeMethods.SystemBatteryState)Marshal.PtrToStructure(status, typeof(PowerManagementNativeMethods.SystemBatteryState));
            }
            finally
            {
                Marshal.FreeCoTaskMem(status);
            }

            return batt_status;
        }

        /// <summary>
        /// Registers the application to receive power setting notifications 
        /// for the specific power setting event.
        /// </summary>
        /// <param name="handle">Handle indicating where the power setting 
        /// notifications are to be sent.</param>
        /// <param name="powerSetting">The GUID of the power setting for 
        /// which notifications are to be sent.</param>
        /// <returns>Returns a notification handle for unregistering 
        /// power notifications.</returns>
        internal static int RegisterPowerSettingNotification(
            IntPtr handle, Guid powerSetting)
        {
            int outHandle = PowerManagementNativeMethods.RegisterPowerSettingNotification(
                handle, 
                ref powerSetting, 
                0);

            return outHandle;
        }

        /// <summary>
        /// Allows an application to inform the system that it 
        /// is in use, thereby preventing the system from entering 
        /// the sleeping power state or turning off the display 
        /// while the application is running.
        /// </summary>
        /// <param name="flags">The thread's execution requirements.</param>
        /// <exception cref="Win32Exception">Thrown if the SetThreadExecutionState call fails.</exception>
        internal static void SetThreadExecutionState(ExecutionState flags)
        {
            ExecutionState? ret = PowerManagementNativeMethods.SetThreadExecutionState(flags);
            if (ret == null)
                throw new Win32Exception("SetThreadExecutionState call failed.");
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Shakeel Iqbal
Software Developer (Senior) TEO
Pakistan Pakistan
Passion and positive dedication is essential part of success. I believe on hardworking and sharing knowledge with others. I always try to be a better than I am and think positive for positive result.

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