C# Signature:

     /* http://msdn2.microsoft.com/en-us/library/aa372761.aspx */

    /// <summary>
    /// Full call to Vista method PowerSettingAccessCheck().
    /// </summary>
    /// <param name="AccessFlags">One or more check specifier flags</param>
    /// <param name="PowerGuid">The relevant Power Policy GUID</param>
    /// <returns></returns>
    [DllImport("powerprof.dll", CharSet = CharSet.Auto, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.U4)]
    internal static extern UInt32 PowerSettingAccessCheck(
                            POWER_DATA_ACCESSOR AccessFlags,
                            [MarshalAs(UnmanagedType.LPStruct)] Guid PowerGuid
                            );

    /// <summary>
    /// Partial call to Vista method PowerSettingAccessCheck() supporting null GUID parameter.
    /// </summary>
    /// <param name="AccessFlags">One or more check specifier flags</param>
    /// <param name="PowerGuid">null</param>
    /// <returns></returns>
    [DllImport("powerprof.dll", CharSet = CharSet.Auto, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.U4)]
    internal static extern UInt32 PowerSettingAccessCheck(
                            POWER_DATA_ACCESSOR AccessFlags,
                            IntPtr PowerGuid
                            );

    #region Group Policy Access FlagsAttribute

    [Flags]
    public enum POWER_DATA_ACCESSOR
    {
        /// <summary>
        /// Check for overrides on AC power settings.
        /// </summary>
        ACCESS_AC_POWER_SETTING_INDEX = 0x0,
        /// <summary>
        /// Check for overrides on DC power settings.
        /// </summary>
        ACCESS_DC_POWER_SETTING_INDEX = 0x1,
        /// <summary>
        /// Check for restrictions on specific power schemes.
        /// </summary>
        ACCESS_SCHEME = 0x10,
        /// <summary>
        /// Check for restrictions on active power schemes.
        /// </summary>
        ACCESS_ACTIVE_SCHEME = 0x13,
        /// <summary>
        /// Check for restrictions on creating or restoring power schemes.
        /// </summary>
        ACCESS_CREATE_SCHEME = 0x14
    };

    #endregion

VB Signature:

Declare Function PowerSettingAccessCheck Lib "powrprof.dll" (TODO) As TODO

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