C# NativeMethods类代码示例

 /// <summary>
 /// Send file to recycle bin
 /// </summary>
 /// <param name="path">Location of directory or file to recycle</param>
 /// <param name="flags">FileOperationFlags to add in addition to FOF_ALLOWUNDO</param>
 public static bool Send(string path, NativeMethods.FileOperationFlags flags)
 {
     try
     {
         if (NativeMethods.IsWOW64Process())
         {
             NativeMethods.SHFILEOPSTRUCT_x64 fs = new NativeMethods.SHFILEOPSTRUCT_x64();
             fs.wFunc = NativeMethods.FileOperationType.FO_DELETE;
             // important to double-terminate the string.
             fs.pFrom = path + '\0' + '\0';
             fs.fFlags = NativeMethods.FileOperationFlags.FOF_ALLOWUNDO | flags;
             NativeMethods.SHFileOperation_x64(ref fs);
         }
         else
         {
             NativeMethods.SHFILEOPSTRUCT_x86 fs = new NativeMethods.SHFILEOPSTRUCT_x86();
             fs.wFunc = NativeMethods.FileOperationType.FO_DELETE;
             // important to double-terminate the string.
             fs.pFrom = path + '\0' + '\0';
             fs.fFlags = NativeMethods.FileOperationFlags.FOF_ALLOWUNDO | flags;
             NativeMethods.SHFileOperation_x86(ref fs);
         }
         return true;
     }
     catch
     {
         return false;
     }
 }

        public static int HookCallback(int code, int wParam, ref NativeMethods.keyboardHookStruct lParam)
        {
            //Debug.WriteLine(code + " " + wParam + "  " + lParam.vkCode + " " + lParam.scanCode + " " + lParam.flags);

            if (code >= 0 && wParam == 256) // KeyDown
            {
                if ((!KeysDown.ContainsKey(lParam.vkCode) ||
                    KeysDown[lParam.vkCode] == false) &&
                    ShouldCancelKeyDown(lParam.vkCode))
                {
                    return 0;
                }

                KeysDown[lParam.vkCode] = true;
            }

            if (code >= 0 && wParam == 257) // KeyUp
            {
                KeysDown[lParam.vkCode] = false;
                if (ShouldCancelKeyUp(lParam.vkCode))
                    return 0;
            }

            return NativeMethods.CallNextHookEx(NextHookPointer, code, wParam, ref lParam);
        }

 /// <summary>
 /// Initializes a new instance of the <see cref="BackupStreamInfo"/> class.
 /// </summary>
 /// <param name="streamID">The stream ID.</param>
 /// <param name="name">The name.</param>
 internal BackupStreamInfo(NativeMethods.WIN32_STREAM_ID streamID, string name)
 {
    m_size = (long)streamID.StreamSize;
    m_name = name;
    m_attributes = (StreamAttributes)streamID.StreamAttributes;
    m_streamType = (BackupStreamType)streamID.StreamType;
 }

 internal PluggableProtocolResponse(
     PluggableProtocolHandler handler,
     NativeMethods.IInternetProtocolSink sink )
 {
     this.handler=handler;
     this.m_Sink=sink;
 }

 private static void ThrowWhenFailed(NativeMethods.ExecutionStates previousState)
 {
     if (previousState == 0)
     {
         throw new Exception("Failed to suppress/restore system power management.");
     }
 }

        public void Compile()
        {
            if (_Command.Connection == null || _Command.Connection.State == ConnectionState.Closed || _Command.Connection.State == ConnectionState.Broken)
            {
                throw new InvalidOperationException("Connection is currently executing an operation.");
            }

            if (_NativeMethods == null) _NativeMethods = _Command.Connection.NativeMethods;

            if (!_FirstStep)
            {
                Reset();
            }
            else
            {
                if (_CommandText.Length == 0) throw new InvalidOperationException("The command text cannot be empty.");

                IntPtr pTail;
                IntPtr pVM;
                _NativeMethods.prepare(_CommandText, out pVM, out pTail);

                if (_NativeMethods.ErrorCode() != SQLiteCode.Ok)
                {
                    throw new SQLiteException(string.Format("Error while prepare statement {0}.\r\n {1}", _CommandText, _NativeMethods.ErrorMessage()));
                }

                _StatementHandle = pVM;
            }

            BindParameters();
        }

		/// <summary>
		/// Get HID attributes.
		/// </summary>
		/// <param name="hidHandle"> HID handle retrieved with CreateFile </param>
		/// <param name="deviceAttributes"> HID attributes structure </param>
		/// <returns> true on success </returns>

		internal Boolean GetAttributes(SafeFileHandle hidHandle, ref NativeMethods.HIDD_ATTRIBUTES deviceAttributes)
		{
			Boolean success;
			try
			{
				//  ***
				//  API function:
				//  HidD_GetAttributes

				//  Purpose:
				//  Retrieves a HIDD_ATTRIBUTES structure containing the Vendor ID, 
				//  Product ID, and Product Version Number for a device.

				//  Accepts:
				//  A handle returned by CreateFile.
				//  A pointer to receive a HIDD_ATTRIBUTES structure.

				//  Returns:
				//  True on success, False on failure.
				//  ***                            

				success = NativeMethods.HidD_GetAttributes(hidHandle, ref deviceAttributes);
			}

			catch (Exception ex)
			{
				DisplayException(ModuleName, ex);
				throw;
			}
			return success;
		}

        internal static unsafe uint ControlCallback(NativeMethods.WMIDPREQUESTCODE RequestCode, IntPtr Context, uint* InOutBufferSize, IntPtr Buffer)
        {
            uint Status;

            switch (RequestCode)
            {

                case NativeMethods.WMIDPREQUESTCODE.WMI_ENABLE_EVENTS:

                    hTraceLog = NativeMethods.GetTraceLoggerHandle(Buffer);

                    Status = NativeMethods.ERROR_SUCCESS;

                    break;

                case NativeMethods.WMIDPREQUESTCODE.WMI_DISABLE_EVENTS:

                    hTraceLog = 0;

                    Status = NativeMethods.ERROR_SUCCESS;

                    break;

                default:

                    Status = NativeMethods.ERROR_INVALID_PARAMETER;

                    break;

            }
            *InOutBufferSize = 0;

            return Status;
        }

 private bool GetBuilderGuidString(NativeMethods.IProvidePropertyBuilder target, int dispid, ref string strGuidBldr, int[] bldrType)
 {
     bool builderAvailable = false;
     string[] pbstrGuidBldr = new string[1];
     if (NativeMethods.Failed(target.MapPropertyToBuilder(dispid, bldrType, pbstrGuidBldr, ref builderAvailable)))
     {
         builderAvailable = false;
     }
     if (builderAvailable && ((bldrType[0] & 2) == 0))
     {
         builderAvailable = false;
     }
     if (!builderAvailable)
     {
         return false;
     }
     if (pbstrGuidBldr[0] == null)
     {
         strGuidBldr = Guid.Empty.ToString();
     }
     else
     {
         strGuidBldr = pbstrGuidBldr[0];
     }
     return true;
 }

 public static AsciiStringSearchAlgorithm CreateSearchAlgo(string pattern, NativeMethods.SearchOptions searchOptions)
 {
     if (pattern.Length <= 64)
     return new AsciiStringSearchBndm64(pattern, searchOptions);
       else
     return new AsciiStringSearchBoyerMoore(pattern, searchOptions);
 }

 public static void DrawText(this VisualStyleRenderer rnd, IDeviceContext dc, ref Rectangle bounds, string text, System.Windows.Forms.TextFormatFlags flags, NativeMethods.DrawThemeTextOptions options)
 {
     NativeMethods.RECT rc = new NativeMethods.RECT(bounds);
     using (SafeGDIHandle hdc = new SafeGDIHandle(dc))
         NativeMethods.DrawThemeTextEx(rnd.Handle, hdc, rnd.Part, rnd.State, text, text.Length, (int)flags, ref rc, ref options);
     bounds = rc;
 }

 internal CategoryEntry(NativeMethods.PERF_OBJECT_TYPE perfObject)
 {
     this.NameIndex = perfObject.ObjectNameTitleIndex;
     this.HelpIndex = perfObject.ObjectHelpTitleIndex;
     this.CounterIndexes = new int[perfObject.NumCounters];
     this.HelpIndexes = new int[perfObject.NumCounters];
 }

 internal IconHandleInfo(NativeMethods.ICONINFO info)
 {
     this.IsIcon = info.fIcon;
     this.Hotspot = new Point(info.xHotspot, info.yHotspot);
     this.MaskBitmap = new BitmapHandle(info.hbmMask);
     this.ColorBitmap = new BitmapHandle(info.hbmColor);
 }

 internal WinPosition(NativeMethods.WINDOWINFO wti)
     {
     this.Left = wti.rcClient.left;
     this.Top = wti.rcClient.top;
     this.Right = wti.rcClient.right;
     this.Bottom = wti.rcClient.bottom;
     }

        /// <summary>Text updating message.</summary>
		/// <remarks>The string will be marshaled: the Message must be correctly disposed after use.</remarks>
        public Message(NativeMethods.TaskDialogMessages msg, DialogElements element, string s) {
            MessageType = msg;
            wParam = (int)element;

            _unsafeHandle = Marshal.StringToHGlobalUni(s);
            lParam = (int)_unsafeHandle;
        }