static extern bool WinHttpCloseHandle(IntPtr hInternet);

Declare Function WinHttpCloseHandle Lib "winhttp.dll" (ByVal hInternet As IntPtr) As Boolean

ERROR_WINHTTP_LOGIN_FAILURE - The login attempt failed. When this error is encountered, close the request handle with WinHttpCloseHandle. A new request handle must be created before retrying the function that originally produced this error.

static extern bool IcmpCloseHandle(IntPtr handle);

Declare Function IcmpCloseHandle Lib "icmp.dll" (IntPtr handle) As Boolean

        private static extern bool IcmpCloseHandle(IntPtr handle);

            IcmpCloseHandle(icmpHandle);

WINBOOL WINAPI IcmpCloseHandle(HANDLE IcmpHandle);

    IcmpCloseHandle(hIcmpFile);

        [DllImport("Wlanapi", EntryPoint = "WlanCloseHandle")]

        public static extern uint WlanCloseHandle([In] IntPtr hClientHandle,

    <DllImport("Wlanapi", EntryPoint := "WlanCloseHandle")> _

    Public Shared Function WlanCloseHandle(<[In]> ByVal hClientHandle As IntPtr, ByVal pReserved As IntPtr) As UInteger

            WlanCloseHandle(handle, IntPtr.Zero);

         WlanCloseHandle(handle, IntPtr.Zero)

    public const int CO_E_FAILEDTOCLOSEHANDLE = unchecked((int)0x80010138);

    Public Const CO_E_FAILEDTOCLOSEHANDLE As Integer = CInt(&H80010138UI)

public extern static int CloseHandle(IntPtr hObject);

     CloseHandle(h);

   CloseHandle(h);

   CloseHandle(h);

   CloseHandle(h);

   CloseHandle(h);

   CloseHandle(h);

Private Declare Sub CloseHandle Lib “kernel32″ _

CloseHandle DeviceHandle

static extern uint MsiCloseHandle(IntPtr hAny);

The sample application below demonstrates how to use MsiRecordSetString, MsiOpenDatabase, MsiCreateRecord, MsiCloseHandle, MsiDatabaseOpenView, MsiViewExecute, MsiDatabaseCommit, and MsiViewClose in C# to modify a property value in an MSI database. To run it, simply create a new Windows Console application and replace the code that Visual Studio gives you with the code below. You may have to modify the namespace name. The sample as-is requires a valid MSI database named SETUP.msi, with a property named PROPERTY1 in the Property table, to be located in C:\. You can of course change the path to your MSI database in the calls to ChangeMSIProperty() in Main() and use any existing property you wish.

    static extern int MsiCloseHandle(IntPtr hAny);

            MsiCloseHandle(msiRecord);

            MsiCloseHandle(msiView);

            MsiCloseHandle(msiHandle);

        CloseHandle(firstRadio);

        CloseHandle(nextRadio);        

    static extern bool CloseHandle(IntPtr handle);

    /// <param name="phRadio">Pointer to where the first enumerated radio handle will be returned. When no longer needed, this handle must be closed via CloseHandle.</param>

        static extern bool CloseHandle(IntPtr hHandle);

                    CloseHandle(hToken);

        public const int CO_E_FAILEDTOCLOSEHANDLE = (int)(0x80010138 - 0x100000000);

public static extern bool CloseHandle(HANDLE hObject);

Declare Function CloseHandle Lib "coredll.dll" (hObject As IntPtr) As Boolean

        public static extern bool CloseHandle(HANDLE hObject);

            CloseHandle(p);

        public static extern bool CloseHandle(HANDLE hObject);

            CloseHandle(p);

    Public Shared Function CloseHandle(ByVal handle As IntPtr) As Boolean

        WaitHandles.CloseHandle(_handle)

            WaitHandles.CloseHandle(Me._handle)

        NativeMethods.CloseHandle(file);

        public static extern bool CloseHandle(HANDLE hObject);

                CloseHandle(p);

    CloseHandle(pi.hProcess);

    CloseHandle(pi.hThread);

Use the DuplicateHandle function to duplicate the handle. Use the CloseHandle function to close the handle. The system closes the handle automatically when the process terminates. The event object is destroyed when its last handle has been closed.

        public static extern bool CloseHandle(HANDLE hObject);

                CloseHandle(p);

        public static extern bool CloseHandle(HANDLE hObject);

                CloseHandle(p);

    CloseHandle hFile

             NativeMethods.CloseHandle(tokenHandle);

      internal static extern Boolean CloseHandle(IntPtr hObject);

    Private Function CloseHandle(ByVal hHandle As IntPtr) As Boolean

            CloseHandle(hToken)

Handles returned from CreateService must be closed using this function, rather than the standard CloseHandle

    Public Function CloseHandle(ByVal handle As IntPtr) As Boolean

    CloseHandle(processInfo.process)

    CloseHandle(processInfo.thread)

        public static extern bool CloseHandle(IntPtr handle);

            CloseHandle(processInfo.process);

            CloseHandle(processInfo.thread);

    CloseHandle(scHandle)

        CloseHandle(lngTokenHandle)

The access token handle that is returned by TokenHandle should be closed using CloseHandle (kernel32) when you are finished using it.

    private static extern bool CloseHandle(IntPtr handle);

      if (!CloseHandle(hToken))

                public static extern int CloseHandle(IntPtr hObject);

                            OSCalls.CloseHandle(m_hToken);

    Public Shared Function CloseHandle(ByVal hwn As IntPtr) As Long

        If pOverlappedPtr <> IntPtr.Zero Then CloseHandle(pOverlapped.hEvent)

static extern bool CloseHandle(IntPtr hObject);

Public Shared Function CloseHandle(ByVal hObject As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean

Declare Auto Function CloseHandle Lib "kernel32.dll" (ByVal hObject As IntPtr) As Boolean

Declare Function CloseHandle Lib "kernel32" Alias "CloseHandle" (ByVal hObject As Integer) As Integer

static def CloseHandle(hObject as IntPtr) as bool:

For .NET 2.0, consider using Microsoft.Win32.SafeHandles.SafeFileHandle instead. It can be used where IntPtr is used. If you use a SafeFileHandle, do not call CloseHandle as the CLR will close it for you (even if it's already closed).

      static extern unsafe bool CloseHandle(

CloseHandle(hMapFile)

CloseHandle(myEventHandle);

NOTE: This class needs some changes. The CloseHandle call will destroy the event when the last handle is closed. This makes it hard for one application to "lock" the event while making another wait on it since this class is always closing the handle. An alternative that I found to work is to have the CreateEvent call in the constructor and implement IDisposable by moving the CloseHandle call to the Dispose method.

    static extern bool CloseHandle(IntPtr hObject);

        CloseHandle( _Handle );

        CloseHandle( _Handle );

        CloseHandle( _Handle );

        CloseHandle( _Handle );

        Win32API.CloseHandle(_hMMF);

    internal static extern bool CloseHandle(IntPtr hFile);

        Win32API.CloseHandle(_hMMF);

    internal static extern bool CloseHandle(IntPtr hFile);

    private static extern bool CloseHandle(IntPtr handle);

        CloseHandle(_handle);

    private static extern bool CloseHandle([In] IntPtr hObject);

        CloseHandle(handleToSnapshot);

   Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Integer) As Integer

       CloseHandle(hdrive)

   static extern bool CloseHandle(IntPtr hHandle);

            CloseHandle(ptrProcess);

        CloseHandle(handle);

        CloseHandle(handle);

    private static extern bool CloseHandle(

        if (ptr !=IntPtr.Zero && ptr.ToInt32() != INVALID_HANDLE_VALUE) CloseHandle(ptr);

    static extern bool CloseHandle(IntPtr hObject);

     static extern bool CloseHandle(IntPtr hObject);

     CloseHandle(hThread);

        ToolHelp.CloseHandle(heaplist_h);  

public static extern bool CloseHandle(IntPtr Object);

  CloseHandle (Job);

                CloseHandle(hHandle); //fair to leak if can't close

                CloseHandle(hHandle); //fair to leak if can't close

See also CloseHandle,

If you use the IntPtr version, use a try/finally block to ensure you call CloseHandle