private static extern void PrintUIEntryW(IntPtr hwnd, IntPtr hinst, string lpszCmdLine, int nCmdShow);

LRESULT APIENTRY buttonPlsVisibleProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)

            MessageBox(hWnd, L"Hello bn", NULL, MB_OK);

        //MoveWindow(hWnd, r.right - 28, 6, 24, 24, TRUE);

        //SetBitmap(hWnd, (isPlaylistVisible ? IDB_RESTORE_PRESSED : IDB_CLOSE_PRESSED));

        //MoveWindow(hWnd, r.right - 29, 5, 24, 24, TRUE);

        //SetBitmap(hWnd, (isPlaylistVisible ? IDB_RESTORE_NORMAL : IDB_CLODE_NORMAL));

    return CallWindowProc(buttonPlsVisible_proc, hWnd, Msg, wParam, lParam);

            public const uint GW_HWNDFIRST = 0;

            public const uint GW_HWNDLAST = 1;

            public const uint GW_HWNDNEXT = 2;

            public const uint GW_HWNDPREV = 3;

            public const uint GW_HWNDFIRST = 0;

            public const uint GW_HWNDLAST = 1;

            public const uint GW_HWNDNEXT = 2;

            public const uint GW_HWNDPREV = 3;

    GW_HWNDFIRST = 0

    GW_HWNDLAST = 1

    GW_HWNDNEXT = 2

    GW_HWNDPREV = 3

static readonly int GWL_HWNDPARENT = -8;

Public Const GWL_HWNDPARENT = -8

     GWLP_HWNDPARENT = -8,

public const IntPtr HWND_BROADCAST = new IntPtr(0xffff);

public const IntPtr HWND_TOP       = new IntPtr(0);

public const IntPtr HWND_BOTTOM    = new IntPtr(1);

public const IntPtr HWND_TOPMOST   = new IntPtr(-1);

public const IntPtr HWND_NOTOPMOST = new IntPtr(-2);

public const IntPtr HWND_MESSAGE   = new IntPtr(-3);

Public Const HWND_BROADCAST As Int32 = &HFFFF

Public Const HWND_TOP As Int32       = &H0

Public Const HWND_BOTTOM As Int32    = &H1

Public Const HWND_TOPMOST As Int32   = -&H1

Public Const HWND_NOTOPMOST As Int32 = -&H2

Public Const HWND_MESSAGE As Int32   = -&H3

public static IntPtr HWND_MESSAGE = new IntPtr(-3);

    // (HIMAGELIST)SNDMSG((hwnd), TCM_GETIMAGELIST, 0, 0L)

    // (HIMAGELIST)SNDMSG((hwnd), TCM_SETIMAGELIST, 0, (LPARAM)(UINT)(HIMAGELIST)(himl))

    // (int)SNDMSG((hwnd), TCM_GETITEMCOUNT, 0, 0L)

    // (BOOL)SNDMSG((hwnd), TCM_GETITEM, (WPARAM)(int)iItem, (LPARAM)(TC_ITEM FAR*)(pitem))

    // (BOOL)SNDMSG((hwnd), TCM_SETITEM, (WPARAM)(int)iItem, (LPARAM)(TC_ITEM FAR*)(pitem))

    // (int)SNDMSG((hwnd), TCM_INSERTITEM, (WPARAM)(int)iItem, (LPARAM)(const TC_ITEM FAR*)(pitem))

    // (BOOL)SNDMSG((hwnd), TCM_DELETEITEM, (WPARAM)(int)(i), 0L)

    // (BOOL)SNDMSG((hwnd), TCM_DELETEALLITEMS, 0, 0L)

    // (BOOL)SNDMSG((hwnd), TCM_GETITEMRECT, (WPARAM)(int)(i), (LPARAM)(RECT FAR*)(prc))

    // (int)SNDMSG((hwnd), TCM_GETCURSEL, 0, 0)

    // (int)SNDMSG((hwnd), TCM_SETCURSEL, (WPARAM)i, 0)

    // (int)SNDMSG((hwndTC), TCM_HITTEST, 0, (LPARAM)(TC_HITTESTINFO FAR*)(pinfo))

    // (BOOL)SNDMSG((hwndTC), TCM_SETITEMEXTRA, (WPARAM)(cb), 0L)

    // (int)SNDMSG(hwnd, TCM_ADJUSTRECT, (WPARAM)(BOOL)bLarger, (LPARAM)(RECT FAR *)prc)

    // (DWORD)SNDMSG((hwnd), TCM_SETITEMSIZE, 0, MAKELPARAM(x,y))

    //     (void)SNDMSG((hwnd), TCM_REMOVEIMAGE, i, 0L)

    //     (void)SNDMSG((hwnd), TCM_SETPADDING, 0, MAKELPARAM(cx, cy))

    //     (int)SNDMSG((hwnd), TCM_GETROWCOUNT, 0, 0L)

    // (int)SNDMSG((hwnd), TCM_GETCURFOCUS, 0, 0)

    // SNDMSG((hwnd),TCM_SETCURFOCUS, i, 0)

    //     (int)SNDMSG((hwnd), TCM_SETMINTABWIDTH, 0, x)

    //     (void)SNDMSG((hwnd), TCM_DESELECTALL, fExcludeFocus, 0)

    // (BOOL)SNDMSG((hwnd), TCM_HIGHLIGHTITEM, (WPARAM)i, (LPARAM)MAKELONG (fHighlight, 0))

    //     (DWORD)SNDMSG((hwnd), TCM_SETEXTENDEDSTYLE, 0, dw)

    //     (DWORD)SNDMSG((hwnd), TCM_GETEXTENDEDSTYLE, 0, 0)

    '     (HIMAGELIST)SNDMSG((hwnd), TCM_GETIMAGELIST, 0, 0L)

    '     (HIMAGELIST)SNDMSG((hwnd), TCM_SETIMAGELIST, 0, (LPARAM)(UINT)(HIMAGELIST)(himl))

    '     (int)SNDMSG((hwnd), TCM_GETITEMCOUNT, 0, 0L)

    '     (BOOL)SNDMSG((hwnd), TCM_GETITEM, (WPARAM)(int)iItem, (LPARAM)(TC_ITEM FAR*)(pitem))

    '     (BOOL)SNDMSG((hwnd), TCM_SETITEM, (WPARAM)(int)iItem, (LPARAM)(TC_ITEM FAR*)(pitem))

    '     (int)SNDMSG((hwnd), TCM_INSERTITEM, (WPARAM)(int)iItem, (LPARAM)(const TC_ITEM FAR*)(pitem))

    '     (BOOL)SNDMSG((hwnd), TCM_DELETEITEM, (WPARAM)(int)(i), 0L)

    '     (BOOL)SNDMSG((hwnd), TCM_DELETEALLITEMS, 0, 0L)

    '     (BOOL)SNDMSG((hwnd), TCM_GETITEMRECT, (WPARAM)(int)(i), (LPARAM)(RECT FAR*)(prc))

    '     (int)SNDMSG((hwnd), TCM_GETCURSEL, 0, 0)

    '     (int)SNDMSG((hwnd), TCM_SETCURSEL, (WPARAM)i, 0)

    '     (int)SNDMSG((hwndTC), TCM_HITTEST, 0, (LPARAM)(TC_HITTESTINFO FAR*)(pinfo))

    '     (BOOL)SNDMSG((hwndTC), TCM_SETITEMEXTRA, (WPARAM)(cb), 0L)

    '     (int)SNDMSG(hwnd, TCM_ADJUSTRECT, (WPARAM)(BOOL)bLarger, (LPARAM)(RECT FAR *)prc)

    '     (DWORD)SNDMSG((hwnd), TCM_SETITEMSIZE, 0, MAKELPARAM(x,y))

    '     (void)SNDMSG((hwnd), TCM_REMOVEIMAGE, i, 0L)

    '     (void)SNDMSG((hwnd), TCM_SETPADDING, 0, MAKELPARAM(cx, cy))

    '     (int)SNDMSG((hwnd), TCM_GETROWCOUNT, 0, 0L)

    '     (int)SNDMSG((hwnd), TCM_GETCURFOCUS, 0, 0)

    '     SNDMSG((hwnd),TCM_SETCURFOCUS, i, 0)

    '     (int)SNDMSG((hwnd), TCM_SETMINTABWIDTH, 0, x)

    '     (void)SNDMSG((hwnd), TCM_DESELECTALL, fExcludeFocus, 0)

    '     (BOOL)SNDMSG((hwnd), TCM_HIGHLIGHTITEM, (WPARAM)i, (LPARAM)MAKELONG (fHighlight, 0))

    '     (DWORD)SNDMSG((hwnd), TCM_SETEXTENDEDSTYLE, 0, dw)

    '     (DWORD)SNDMSG((hwnd), TCM_GETEXTENDEDSTYLE, 0, 0)

     if (m.Msg == Win32.WM_ACTIVATE && m.HWnd == f.Handle

        public const int ERROR_HWNDS_HAVE_DIFF_PARENT = 1441;

        public const int OLE_E_INVALIDHWND = (int)(0x8004000F - 0x100000000);

        public const int DRAGDROP_E_INVALIDHWND = (int)(0x80040102 - 0x100000000);

        public const int OLEOBJ_S_INVALIDHWND = 0x00040182;

static extern uint BluetoothAuthenticateDeviceEx(IntPtr hwndParentIn, IntPtr hRadioIn, ref BLUETOOTH_DEVICE_INFO pbtdiInout, BLUETOOTH_OOB_DATA pbtOobData, uint authenticationRequirement);

static extern uint BluetoothAuthenticateDeviceEx(IntPtr hwndParentIn, IntPtr hRadioIn, ref BLUETOOTH_DEVICE_INFO pbtdiInout, BLUETOOTH_OOB_DATA pbtOobData, uint authenticationRequirement);

private static extern bool CeGetUserNotificationPreferences(IntPtr hWndParent, byte[] lpNotification);

private static extern bool CeGetUserNotificationPreferences(IntPtr hWndParent, byte[] lpNotification);

static extern int ChangeDisplaySettingsEx(string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, int dwflags, IntPtr lParam);

Declare Function ChangeDisplaySettingsEx Lib "coredll.dll" (ByVal lpszDeviceName As String, ByVal lpDevMode As Byte(), ByVal hwnd As IntPtr, ByVal dwflags As CDSFlags, ByVal lParam As IntPtr) As CDSRet

        ref DEVMODE lpDevMode, IntPtr hwnd, int dwflags, IntPtr lParam);

    Friend Shared Function ChangeDisplaySettingsEx(ByVal lpszDeviceName As String, ByVal lpDevMode As Byte(), ByVal hwnd As IntPtr, ByVal dwflags As CDSFlags, ByVal lParam As IntPtr) As CDSRet

hwnd

in Specifies the scope of this function. Set to TGF_SCOPE_WINDOW to disable gestures for the window indicated by hwnd. Set to TGF_SCOPE_PROCESS to disable gestures for the application process.

    public static extern bool DisableGestures(IntPtr hwnd, UInt64 TGFflags, uint scope);

hwnd

in Specifies the scope of this function. Set to TGF_SCOPE_WINDOW to enable gestures for the window indicated by hwnd. Set to TGF_SCOPE_PROCESS to enable gestures for the application process.

public static extern bool EnableGestures(IntPtr hwnd, UInt64 TGFflags, uint scope);

private static extern IntPtr GetDC(IntPtr hwnd);

    private static extern IntPtr GetDC(IntPtr hwnd);

    public const int HWND_TOP = 0;

    public const int HWND_BOTTOM = 1;

    public const int HWND_TOPMOST = -1;

    public const int HWND_NOTOPMOST = -2;

private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags);

Private Shared Function SetWindowPos(ByVal hWnd As IntPtr, _

     ByVal hWndInsertAfter As IntPtr, _

public IntPtr GetHWnd(Control ctrl)

   IntPtr hWnd = GetCapture();

   return hWnd;

    IntPtr hWnd = GetCapture();

    SetWindowPos(hWnd,

        hWnd,

static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X,

   public static extern int GetClassName(IntPtr hWnd, StringBuilder buf, int nMaxCount);

   (hWnd as IntPtr, buf As StringBuilder, nMaxCount As Integer) As Integer

   IntPtr hWnd = GetDesktopWindow();

   GetClassName(hWnd, strClassName, strClassName.Capacity);

private static extern IntPtr GetDCCE(IntPtr hWnd);

private static extern bool SetForegroundWindow(IntPtr hWnd);

private static extern IntPtr GetWindowDCCE(IntPtr hWnd);

Private Shared Function GetWindowDC(ByVal hWnd As HandleRef) As IntPtr

Declare Function GetWindowDC Lib "coredll.dll" (ByVal hWnd As HandleRef) As IntPtr

static extern System.UInt32 GetWindowLong(IntPtr  hWnd, int nIndex);

    Private Shared Function GetWindowLong(ByVal hWnd As IntPtr, ByVal nIndex As Integer) As System.UInt32

public static extern IntPtr ImmGetContext(IntPtr hWnd);

Declare Function ImmGetContext Lib "coredll.dll" (hWnd As IntPtr) As IntPtr

public static extern IntPtr ImmReleaseContext(IntPtr hWnd, IntPtr context);

        IntPtr hWnd= IntPtr.Zero;

        hWnd= GetActiveWindow();

        if(hWnd == IntPtr.Zero){

        context= ImmGetContext(hWnd);       //get IMEContext

            ImmReleaseContext(hWnd, context);   //Release IMEContext

public static extern int MessageBoxW(int hWnd, String text, String caption, uint type);

    Public Shared Function MessageBoxW(ByVal hWnd As Integer, _

        public IntPtr HWnd;

            notdata.HWnd = this.Hwnd;

private static extern bool OpenClipboard(IntPtr hWndNewOwner); !!!!VB Signature:

private static extern bool OpenClipboard(IntPtr hWndNewOwner);  

<DllImport("coredll.dll")> Shared Function OpenClipboard(ByVal hWndNewOwner As Integer) As Boolean

internal static extern bool PostKeybdMessage(IntPtr hwnd, uint vKey, KeyStateFlags flags, uint cCharacters, KeyStateFlags[] pShiftStateBuffer, uint[] pCharacterBuffer);

private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

Declare Function SendMessage Lib "coredll.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As IntPtr

    public static extern int SendMessage(IntPtr hWnd, WM Msg, int wParam, int lParam);

    public static extern int SendMessage(IntPtr hWnd, WM Msg, int wParam, int lParam);

static extern IntPtr SetCapture(IntPtr hWnd);

Declare Function SetCapture Lib "coredll.dll" (ByVal hWnd As IntPtr) As IntPtr

public IntPtr GetHWnd(Control ctrl)

   IntPtr hWnd = GetCapture();

   return hWnd;

    <DllImport("coredll.dll")> Shared Function OpenClipboard(ByVal hWndNewOwner As Integer) As Boolean

private static extern bool SetForegroundWindow (IntPtr hWnd);

Private Shared Function SetForegroundWindow(ByVal hWnd As IntPtr) As Boolean

Private Declare Function SetForegroundWindow Lib "coredll" (hWnd as IntPtr) As Boolean

E.g. SetForegroundWindow((HWND)(((ULONG) hwnd) | 0x01) );

private static extern bool SetForegroundWindow (IntPtr hWnd);

    static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw);

    static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw);

    static extern int SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);

private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

Private Shared Function SetWindowLong(ByVal hWnd As IntPtr, ByVal nIndex As Integer, ByVal dwNewLong As Integer) As Integer

Private Shared Function GetWindowLong(ByVal hWnd As IntPtr, ByVal nIndex As Integer) As Integer

        IntPtr hWnd;

        // hWnd = GetCapture();

       hWnd = ctrl.Handle;

        style = GetWindowLong(hWnd, GWL_STYLE);

        SetWindowLong(hWnd, GWL_STYLE, (style | BS_CENTER | BS_VCENTER | BS_MULTILINE));

    Private Function SetWindowLong(ByVal hWnd As IntPtr, ByVal nIndex As Integer, ByVal dwNewLong As Integer) As Integer

    Private Function GetWindowLong(ByVal hWnd As IntPtr, ByVal nIndex As Integer) As Integer

    Dim hWnd As IntPtr

    hWnd = ctrl.Handle

    style = GetWindowLong(hWnd, GWL_STYLE)

    SetWindowLong(hWnd, GWL_STYLE, (style Or BS_VCENTER Or BS_MULTILINE))

private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags);

Private Shared Function SetWindowPos(ByVal hWnd As IntPtr, _

     ByVal hWndInsertAfter As IntPtr, _

    public const int HWND_TOP = 0;

    public const int HWND_BOTTOM = 1;

    public const int HWND_TOPMOST = -1;

    public const int HWND_NOTOPMOST = -2;

    private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, SetWindowPosFlags uFlags);

    private const int HWND_TOP = 0;

    private const int HWND_BOTTOM = 1;

    private const int HWND_TOPMOST = -1;

    private const int HWND_NOTOPMOST = -2;

        /// top of either the topmost or non-topmost group (depending on the setting of the hWndInsertAfter

        /// <summary>Retains the current Z order (ignores the hWndInsertAfter parameter).</summary>

        IntPtr hwnd = new WindowInteropHelper(this.window).Handle;

        SetWindowPos(hwnd, (IntPtr)HWND_BOTTOM, 0, 0, 0, 0,

    static extern int SHGetSpecialFolderPath(IntPtr hwndOwner, StringBuilder lpszPath, int nFolder, int fCreate);

static extern int SHGetSpecialFolderPath(IntPtr hwndOwner, StringBuilder lpszPath, int nFolder, int fCreate);

static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

Declare Function ShowWindow Lib "coredll.dll" (ByRef hWnd As IntPtr, ByVal nCmdShow As Integer) As Boolean

hWnd is a parameter containing the handle to the window.

static extern uint TrackPopupMenuEx(IntPtr hMenu, uint uFlags, int x, int y, IntPtr hWnd, IntPtr tpmParams);

    uint menuItemID = TrackPopupMenuEx(hMenu, TPM_BOTTOMALIGN | TPM_RETURNCMD, Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height, eventSink.Hwnd, IntPtr.Zero);

            IntPtr hwnd = IntPtr.Zero;

      public IntPtr hwndParent;

    credui.hwndParent = this.Handle;

     public IntPtr hwndParent;

static extern bool WTSRegisterSessionNotification(IntPtr hWnd, [MarshalAs(UnmanagedType.U4)] int dwFlags);

Declare Function WTSRegisterSessionNotification Lib "wtsapi32.dll" (ByVal hWnd as IntPtr, ByVal dwFlags as Int32) As Boolean

        private static extern bool WTSRegisterSessionNotification(IntPtr hWnd, [MarshalAs(UnmanagedType.U4)]int dwFlags);

        private static extern bool WTSUnRegisterSessionNotification(IntPtr hWnd);

        IntPtr    hwnd,

    Private Shared Function SQLDriverConnect(ByVal hdbc As IntPtr, ByVal hwnd As IntPtr, ByVal szConnStrIn As String, _

    public IntPtr hwndOwner;

    public IntPtr hwndOwner;

private static extern Int32 InternetDial(IntPtr hwndParent, string lpszConnectoid, Int32 dwFlags, ref Int32 lpdwConnection, Int32 dwReserved);

IntPtr hWnd = WindowFromPoint(pt);

GetWindowThreadProcessId(hWnd, out pid);

private static extern int WNetAddConnection3(IntPtr hWndOwner,

    ''' <param name="hWndOwner"></param>

    Private Shared Function WNetAddConnection3(ByVal hWndOwner As IntPtr, _

WNetAddConnection3(hWnd, ref ConnInf, null, null,

private static extern int WNetAddConnection3(IntPtr hWndOwner,

    ''' <param name="hWndOwner"></param>

    Private Shared Function WNetAddConnection3(ByVal hWndOwner As IntPtr, _

WNetAddConnection3(hWnd, ref ConnInf, null, null,

    IntPtr      hwndOwner,

    ///<Summary>Does not activate the window. If this flag is not set, the window is activated and moved to the top of either the topmost or non-topmost group (depending on the setting of the hWndInsertAfter parameter).</Summary>

    ///<Summary>Retains the current Z order (ignores the hWndInsertAfter parameter).</Summary>

    '''<Summary>Does not activate the window. If this flag is not set, the window is activated and moved to the top of either the topmost or non-topmost group (depending on the setting of the hWndInsertAfter parameter).</Summary>

    '''<Summary>Retains the current Z order (ignores the hWndInsertAfter parameter).</Summary>

    /// below the window identified by hWnd.</summary>

    /// above the window identified by hWnd.</summary>

    /// set to the upper-left corner of the window identified by hWnd.</summary>

    ''' below the window identified by hWnd.</summary>

    ''' above the window identified by hWnd.</summary>

    ''' set to the upper-left corner of the window identified by hWnd.</summary>

public static extern int DwmSetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE attr, ref int attrValue, int attrSize);

Public Shared Function DwmSetWindowAttribute(hwnd As IntPtr, attr As DWMWINDOWATTRIBUTE, ByRef attrValue As Integer, attrSize As Integer) As Integer