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//So we'll have to use Reflection to access it. This code was inspired by:

- The foreground lock time-out has expired (see SPI_GETFOREGROUNDLOCKTIMEOUT in SystemParametersInfo).

but calling this generates as PInvokeStackImbalance MDA exception (though seems to work, despite it).

/// <item>The foreground lock time-out has expired (see SPI_GETFOREGROUNDLOCKTIMEOUT in SystemParametersInfo).</item>

static extern bool SystemParametersInfo(SPI uiAction, uint uiParam, ref T pvParam, SPIF fWinIni); // T = any type

static extern bool SystemParametersInfo(SPI uiAction, uint uiParam, IntPtr pvParam, SPIF fWinIni);

static extern bool SystemParametersInfo(uint uiAction, uint uiParam, String pvParam, SPIF fWinIni);

static extern bool SystemParametersInfo(uint uiAction, uint uiParam, StringBuilder pvParam, SPIF fWinIni);

static extern bool SystemParametersInfo(SPI uiAction, uint uiParam, ref ANIMATIONINFO pvParam, SPIF fWinIni);

SPI, SPIF, ANIMATIONINFO

When using the SPI_GETANIMATION or SPI_SETANIMATION actions, the uiParam value must be set to (System.UInt32)Marshal.SizeOf(typeof(ANIMATIONINFO)).

// This code works for SPI_GETFOREGROUNDLOCKTIMEOUT, the above signature doesn't. (Ken)

bool retVal = SystemParametersInfoGet(SPI_GETFOREGROUNDLOCKTIMEOUT, 0, ref timeout, 0);

SystemParametersInfoSet(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, 0, 0);

SPI_GETNONCLIENTMETRICS is a good way to get user-defined preferences for fonts, colors, icons, etc. There is no other way to do this in .NET as far as I know!

private const int SPI_GETNONCLIENTMETRICS = 41;

SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, ref metrics, 0);

private static UInt32 SPI_SETDESKWALLPAPER = 20;

private static UInt32 SPIF_UPDATEINIFILE = 0x1;

SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, filename, SPIF_UPDATEINIFILE);

Const SPI_SetWallpaper As Integer = &H14

Const SPIF_UpdateIni As Integer = 1

Const SPIF_SendIniChange As Integer = 2

Const SPIF_UpdateAndSend As Integer = SPIF_UpdateIni Or SPIF_SendIniChange '3

intReturn = SystemParametersInfo(SPI.SetWallpaper, 0, strFile, SPIF.UpdateAndSend)

static extern bool SystemParametersInfo(uint uiAction, uint uiParam, StringBuilder pvParam, SPIF fWinIni);

const uint SPI_GETDESKWALLPAPER = 0x0073;

if (!SystemParametersInfo(SPI_GETDESKWALLPAPER, (uint)sb.Capacity, sb, SPIF.None))

namespace SSPITest

public class SSPIHelper

public SSPIHelper()

public SSPIHelper(string sRemotePrincipal)

//SSPIHelper.SignAndVerify(ref _hClientContext,ref hServerContext,ref DescBuffer);

SSPIHelper MyHelper = new SSPIHelper();

SSPIHelper MyServerHelper = new SSPIHelper();

/// Enables the drop shadow effect on a window. The effect is turned on and off through SPI_SETDROPSHADOW.

''' Enables the drop shadow effect on a window. The effect is turned on and off through SPI_SETDROPSHADOW.

// FACILITY_SSPI

#region (0x090000 - 0x09FFFF) FACILITY_SSPI (FACILITY_SECURITY) errors

// FACILITY_SSPI

///Client's supplied SSPI channel bindings were incorrect.

[Description("Client's supplied SSPI channel bindings were incorrect.")]

// Note that additional FACILITY_SSPI errors are in issperr.h

' FACILITY_SSPI

#Region "(0x090000 - 0x09FFFF) FACILITY_SSPI (FACILITY_SECURITY) errors"

' FACILITY_SSPI

'''Client's supplied SSPI channel bindings were incorrect.

<Description("Client's supplied SSPI channel bindings were incorrect.")> _

' Note that additional FACILITY_SSPI errors are in issperr.h

public enum SPIF

SPIF_UPDATEINIFILE = 0x01,

SPIF_SENDCHANGE = 0x02,

/// <summary>Same as SPIF_SENDCHANGE.</summary>

SPIF_SENDWININICHANGE = 0x02

Enum SPIF

SPIF_UPDATEINIFILE = &H1 ' Writes the new system-wide parameter setting to the user profile.

SPIF_SENDCHANGE = &H2 ' Broadcasts the WM_SETTINGCHANGE message after updating the user profile.

SPIF_SENDWININICHANGE = &H2 ' Same as SPIF_SENDCHANGE.

public enum SPIF

SPIF_UPDATEINIFILE = 0x01,

SPIF_SENDCHANGE = 0x02,

/// <summary>Same as SPIF_SENDCHANGE.</summary>

SPIF_SENDWININICHANGE = 0x02

Enum SPIF

SPIF_UPDATEINIFILE = &H1 ' Writes the new system-wide parameter setting to the user profile.

SPIF_SENDCHANGE = &H2 ' Broadcasts the WM_SETTINGCHANGE message after updating the user profile.

SPIF_SENDWININICHANGE = &H2 ' Same as SPIF_SENDCHANGE.

/// To set the width of the double-click rectangle, call SystemParametersInfo with SPI_SETDOUBLECLKWIDTH.

/// call the SystemParametersInfofunction with the SPI_GETWORKAREA value.

/// rectangle, call SystemParametersInfo with SPI_SETDOUBLECLKHEIGHT.

/// call the SystemParametersInfo function with the SPI_GETWORKAREA value.

''' Width of the client area for a full-screen window on the primary display monitor in pixels. To get the coordinates of the portion of the screen not obscured by the system taskbar or by application desktop toolbars call the SystemParametersInfo function with the SPI_GETWORKAREA value.

''' Height of the client area for a full-screen window on the primary display monitor in pixels. To get the coordinates of the portion of the screen not obscured by the system taskbar or by application desktop toolbars call the SystemParametersInfo function with the SPI_GETWORKAREA value.

/// <B>Note</B> Despite its name, specifying this type does not return the window station name.

SPINT_ constants used in the SP_DEVICE_INTERFACE_DATA structure.

/// Invalid system-wide (SPI_*) parameter.

public const int ERROR_INVALID_SPI_VALUE = 1439;

/// Failed to obtain security function table dispatch address from SSPI.

public const int ERROR_IPSEC_IKE_FAILSSPINIT = 13853;

/// Failed to determine SSPI principal name for ISAKMP/ERROR_IPSEC_IKE service (QueryCredentialsAttributes).

/// Failed to obtain new SPI for the inbound SA from Ipsec driver. The most common cause for this is that the driver does not have the correct filter. Check your policy to verify the filters.

public const int ERROR_IPSEC_IKE_GETSPIFAIL = 13857;

/// Client's supplied SSPI channel bindings were incorrect.

[DispId(2)]

[DispId(3)]

[DispId(4)]

[DispId(5)]

[DispId(6)]

[DispId(7)]

[DispId(8)]

[DispId(9)]

[DispId(10)]

[DispId(11)]

[DispId(0xc)]

[DispId(0xd)]

[DispId(0xe)]

[DispId(0x66)]

[DispId(0x6c)]

[DispId(0x69)]

[DispId(0x6a)]

[DispId(0x68)]

[DispId(0x71)]

[DispId(0x70)]

[DispId(250)]

[DispId(0xfb)]

[DispId(0xfc)]

[DispId(0x103)]

[DispId(0xfd)]

[DispId(0xfe)]

[DispId(0xff)]

[DispId(0x100)]

[DispId(0x101)]

[DispId(0x102)]

[DispId(260)]

[DispId(0x106)]

[DispId(0x108)]

[DispId(0x109)]

[DispId(0x10a)]

[DispId(0x10b)]

[DispId(0x107)]

[DispId(0x10c)]

[DispId(0x10d)]

[DispId(270)]

[DispId(0x10f)]

[DispId(0xe1)]

[DispId(0xe2)]

[DispId(0xe3)]

[DispId(0x110)]

[DispId(0x111)]

<DispId(250)> _

<DispId(268)> _

<DispId(105)> _

<DispId(259)> _

<DispId(106)> _

<DispId(104)> _

<DispId(270)> _

<DispId(252)> _

<DispId(271)> _

<DispId(251)> _

<DispId(273)> _

<DispId(258)> _

<DispId(256)> _

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<DispId(257)> _

<DispId(260)> _

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<DispId(254)> _

<DispId(225)> _

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<DispId(272)> _

<DispId(108)> _

<DispId(112)> _

<DispId(269)> _

<DispId(102)> _

<DispId(113)> _

<DispId(227)> _

<DispId(263)> _

<DispId(267)> _

<DispId(264)> _

<DispId(262)> _

<DispId(265)> _

<DispId(266)> _

[DispId(1)]

int OnChanged(int dispId);

int OnRequestEdit(int dispId);

Function OnChanged(ByVal dispId As Int32) As Int32

Function OnRequestEdit(ByVal dispId As Int32) As Int32

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(100)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x65)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x66)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x67)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x68)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(-550)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x69)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x6a)]

[DispId(200)]

object Application { [return: MarshalAs(UnmanagedType.IDispatch)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(200)] get; }

[DispId(0xc9)]

object Parent { [return: MarshalAs(UnmanagedType.IDispatch)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xc9)] get; }

[DispId(0xca)]

object Container { [return: MarshalAs(UnmanagedType.IDispatch)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xca)] get; }

[DispId(0xcb)]

object Document { [return: MarshalAs(UnmanagedType.IDispatch)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xcb)] get; }

[DispId(0xcc)]

bool TopLevelContainer { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xcc)] get; }

[DispId(0xcd)]

string Type { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xcd)] get; }

[DispId(0xce)]

int Left { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xce)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xce)] set; }

[DispId(0xcf)]

int Top { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xcf)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xcf)] set; }

[DispId(0xd0)]

int Width { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd0)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd0)] set; }

[DispId(0xd1)]

int Height { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd1)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd1)] set; }

[DispId(210)]

string LocationName { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(210)] get; }

[DispId(0xd3)]

string LocationURL { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd3)] get; }

[DispId(0xd4)]

bool Busy { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0xd4)] get; }

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(300)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x12d)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x12e)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x12f)]

[DispId(0)]

string Name { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0)] get; }

[DispId(-515)]

int HWND { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(-515)] get; }

[DispId(400)]

string FullName { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(400)] get; }

[DispId(0x191)]

string Path { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x191)] get; }

[DispId(0x192)]

bool Visible { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x192)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x192)] set; }

[DispId(0x193)]

bool StatusBar { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x193)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x193)] set; }

[DispId(0x194)]

string StatusText { [return: MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x194)] get; [param: In, MarshalAs(UnmanagedType.BStr)] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x194)] set; }

[DispId(0x195)]

int ToolBar { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x195)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x195)] set; }

[DispId(0x196)]

bool MenuBar { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x196)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x196)] set; }

[DispId(0x197)]

bool FullScreen { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x197)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x197)] set; }

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(500)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x1f5)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x1f6)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x1f7)]

[DispId(-525)]

tagREADYSTATE ReadyState { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(-525), TypeLibFunc((short)4)] get; }

[DispId(550)]

bool Offline { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(550)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(550)] set; }

[DispId(0x227)]

bool Silent { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x227)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x227)] set; }

[DispId(0x228)]

bool RegisterAsBrowser { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x228)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x228)] set; }

[DispId(0x229)]

bool RegisterAsDropTarget { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x229)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x229)] set; }

[DispId(0x22a)]

bool TheaterMode { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22a)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22a)] set; }

[DispId(0x22b)]

bool AddressBar { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22b)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22b)] set; }

[DispId(0x22c)]

bool Resizable { [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22c)] get; [param: In] [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), DispId(0x22c)] set; }