static extern bool DwmDefWindowProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, ref IntPtr plResult);

Private Shared Function DwmDefWindowProc(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr, ByRef plResult As IntPtr) As Integer

static extern void DwmEnableBlurBehindWindow(IntPtr hwnd, ref DWM_BLURBEHIND blurBehind);

Private Shared Sub DwmEnableBlurBehindWindow(ByVal hwnd As IntPtr, ByRef blurBehind As DWM_BLURBEHIND)

static extern int DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);

Private Shared Function DwmExtendFrameIntoClientArea(ByVal hwnd As IntPtr, ByRef margins As MARGINS) As Integer

static extern int DwmGetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE dwAttribute, out bool pvAttribute, int cbAttribute);

static extern int DwmGetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE dwAttribute, out RECT pvAttribute, int cbAttribute);

    static extern System.UInt16  SetWindowRgn(IntPtr hWnd, IntPtr hRgn, bool bRedraw);

        static extern IntPtr GetDC(IntPtr hWnd);

        static extern IntPtr GetDC(IntPtr hWnd);

            Graphics graphics = Graphics.FromHwnd(IntPtr.Zero);

            Graphics graphics = Graphics.FromHwnd(IntPtr.Zero);

    Graphics vGraphics = Graphics.FromHwnd(Handle);

        static extern IntPtr GetDC(IntPtr hWnd);

        using (System.Drawing.Graphics g = System.Drawing.Graphics.FromHwnd(IntPtr.Zero))

        Using g As System.Drawing.Graphics = System.Drawing.Graphics.FromHwnd(IntPtr.Zero)

        Graphics g = Graphics.FromHwnd(IntPtr.Zero);

  static extern IntPtr GetDC(IntPtr hwnd);

  static extern Int32 ReleaseDC(IntPtr hwnd, IntPtr hdc);

      static extern IntPtr GetDC(IntPtr hwnd);

      static extern Int32 ReleaseDC(IntPtr hwnd, IntPtr hdc);

    private static IntPtr HWND_BROADCAST = new IntPtr(0xffff);

    private static IntPtr HWND_TOP = new IntPtr(0);

    private static IntPtr HWND_BOTTOM = new IntPtr(1);

    private static IntPtr HWND_TOPMOST = new IntPtr(-1);

    private static IntPtr HWND_NOTOPMOST = new IntPtr(-2);

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

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

        long result = SendMessage(HWND_BROADCAST, WindowsMessages.WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);

public static extern IntPtr GetDC(IntPtr hWnd);

public static extern IntPtr GetDC(IntPtr hWnd);

    Graphics vGraphics = Graphics.FromHwnd(Handle);

    Using G = Graphics.FromHwnd(Me.Handle)

  static extern uint SHFullScreen(IntPtr hwndRequester, uint dwState);

  Public Shared Function SHFullScreen( hWnd as IntPtr, flags as Integer ) as Integer

Hide the Start button icon on the navigation bar. When the Start icon is hidden, the shell is in a special state in which clicking or tapping the navigation bar will not display the drop-down Start menu. The navigation bar is essentially disabled when in this state. While in this mode, WM_LBUTTONDOWN and WM_LBUTTONUP messages will be forwarded to hwndRequester. This allows an application to drop out of this mode by calling this function with the SHFS_SHOWSTARTICON, when the user clicks or taps the navigation bar.

static extern bool SHFullScreen(IntPtr hwndRequester, uint dwState);

   IntPtr hwnd = GetCapture();

      return SHFullScreen(hwnd, SHFS_HIDETASKBAR | SHFS_HIDESIPBUTTON | SHFS_HIDESTARTICON);

      return SHFullScreen(hwnd, SHFS_SHOWTASKBAR | SHFS_SHOWSIPBUTTON | SHFS_SHOWSTARTICON);

   public IntPtr hwndClient = IntPtr.Zero;

Use this in conjunction with the SetCapture/GetCapture HWND sample:

static bool RecognizeGesture(IntPtr hWnd, int x, int y)

   shrginfo.hwndClient = hWnd;

static extern bool SHSipPreference(IntPtr hwnd, SIPSTATE st);

Declare Function SHSipPreference Lib "aygshell.dll" (hwnd as IntPtr, st as Integer) As Bool

static extern bool SHSipPreference(IntPtr hwnd, SIPSTATE st);

static extern bool CommConfigDialog(string lpszName, IntPtr hWnd,

Private Function ShowWindow(ByVal hwnd As IntPtr, ByVal nCmdShow As ShowWindowCommands) As Boolean

Dim hwnd As New IntPtr(0)

hwnd = GetConsoleWindow()

If (hwnd <> IntPtr.Zero) Then

    ShowWindow(hwnd, ShowWindowCommands.ShowMinimized)

  SetPriorityClass(mhHwnd, CType(20, System.IntPtr))    '20 = high !!

static extern int MsiSetInternalUI(int dwUILevel, ref IntPtr phWnd);

static extern int MsiSetInternalUI(INSTALLUILEVEL dwUILevel, ref IntPtr phWnd);

Private Function MsiSetInternalUI(dwUILevel As INSTALLUILEVEL, ByRef phWnd As IntPtr) As Integer

IntPtr hwnd = IntPtr.Zero;

MsiUtils.MsiSetInternalUI(MsiUtils.INSTALLUILEVEL.INSTALLUILEVEL_NONE , ref hwnd);

     [In] IntPtr hwnd);

    void SetWindow(IntPtr hwnd, ref RECT rect);

    void QueryFocus(out IntPtr phwnd);

    IntPtr hwndEdit,

Declare Function SHAutoComplete Lib "shlwapi.dll" (ByVal hWndEdit As IntPtr, ByVal dwFlags As AutoCompleteFlags) As Integer

    [In] IntPtr hwnd,

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);

    public IntPtr hwndOwner;

     Public hwndOwner As IntPtr

   public IntPtr hwnd;

• Desktop handle to the window specified by hwnd. This is returned only if BroadcastSystemMessageEx specifies BSF_RETURNHDESK and BSF_QUERY.

• hwnd

        public IntPtr        hwnd;          // might be NULL (indicating no owner window)

    public IntPtr hwndCombo;

    public IntPtr hwndEdit;

    public IntPtr hwndList;

    hwndCombo As Long

    hwndEdit As Long

    hwndList As Long

   SendMessage(hWnd, WM_COPYDATA, IntPtr.Zero, copyDataBuff);

        public IntPtr hwndParent;

        Public hwndParent As IntPtr

            public IntPtr hwndParent;

    Public hwndParent As IntPtr

    public IntPtr hwndApp;

    Public hwndApp As IntPtr

     IntPtr hWnd;

        public IntPtr hwnd;

        Public hWnd As IntPtr

    public IntPtr hwnd;

    Public hwnd As IntPtr

    public IntPtr        hwndActive;

    public IntPtr        hwndFocus;

    public IntPtr        hwndCapture;

    public IntPtr        hwndMenuOwner;

    public IntPtr        hwndMoveSize;

    public IntPtr        hwndCaret;

    Public hwndActive As IntPtr

    Public hwndFocus As IntPtr

    Public hwndCapture As IntPtr

    Public hwndMenuOwner As IntPtr

    Public hwndMoveSize As IntPtr

    Public hwndCaret As IntPtr

    public IntPtr hwnd;

    public IntPtr hwnd;

    public IntPtr hwndOwner;

   public IntPtr hwndFrom;

   Public hwndFrom As IntPtr

    /// taskbar status area. The Shell uses hWnd and uID to identify which icon to operate on

    public IntPtr hwnd;

    /// Application-defined identifier of the taskbar icon. The Shell uses hWnd and uID to identify

    /// associated with a single hWnd by assigning each a different uID.

    /// notifications to the window identified in hWnd.

    public IntPtr hWnd;

    Dim hWnd As IntPtr

   public IntPtr hWnd;

    int hwndOwner;

    Public hwndOwner As IntPtr  

   public IntPtr hwndOwner;

    Public hwndOwner As IntPtr

    public IntPtr hwndOwner;        

   public int hwndParent = 0;