Public Enum WindowsMessages As UInteger

    Public Enum WindowsMessages As Integer

    ''' Applications should send <see cref="WindowsMessages.WmSettingchange"/> to all top-level windows when

    ''' To send the <see cref="WindowsMessages.WmSettingchange"/> message to all top-level windows,

    ''' <see cref="WindowsMessages.HwndBroadcast"/>.

    ''' result of processing the <see cref="WindowsMessages.WmNchitTest"/> message.

    ''' result of processing the <see cref="WindowsMessages.WmNchitTest"/> message.

    ''' result of processing the <see cref="WindowsMessages.WmNchitTest"/> message.

    ''' result of processing the <see cref="WindowsMessages.WmNchitTest"/> message.

    ''' <see cref="WindowsMessages.WmHotkey"/> message.

    ''' or when the window passes the <see cref="WindowsMessages.WmSysCommand"/> message to the

    ''' or when the window passes the <see cref="WindowsMessages.WmSysCommand"/> message to the

    ''' as a result of processing the <see cref="WindowsMessages.WmNchitTest"/> message.

    ''' For a list of hit-test values, see <see cref="WindowsMessages.WmNchitTest"/>.

private delegate int LowLevelKeyboardProc(int nCode,WindowsMessages wParam, [In] KBDLLHOOKSTRUCT lParam);

Private Delegate Function LowLevelKeyboardProc(ByVal nCode As Integer, ByVal wParam As WindowsMessages, <[In]> ByVal lParam As KBDLLHOOKSTRUCT) As Integer

WindowsMessages the type of event. This will be WM_KEYDOWN, WM_KEYUP, WM_SYSKEYDOWN or WM_SYSKEYUP

private delegate IntPtr LowLevelMouseProc(int code, WindowsMessages wParam, [In] MSLLHOOKSTRUCT lParam);

Private Delegate Function LowLevelMouseProc(ByVal code As Integer, ByVal wParam As WindowsMessages, <[In]> ByVal lParam As MSLLHOOKSTRUCT) As IntPtr

WindowsMessages

Check with WindowsMessages for a list of most (if not all) of the constants that will be passed in as messages to the WndProc method.

    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 enum WindowsMessages

Private Shared Function CallNextHookEx(ByVal hhk As IntPtr, ByVal nCode As Integer, ByVal wParam As WindowsMessages, <[In]()> ByRef lParam As KBDLLHOOKSTRUCT) As IntPtr

Private Shared Function CallNextHookEx(ByVal hhk As IntPtr, ByVal nCode As Integer, ByVal wParam As WindowsMessages, <[In]()> ByRef lParam As MSLLHOOKSTRUCT) As IntPtr

           ByVal wParam As WindowsMessages, _

           ByVal wParam As WindowsMessages, _

           ByVal wParam As WindowsMessages, _

WindowsMessages,KBDLLHOOKSTRUCT,MSLLHOOKSTRUCT

static extern IntPtr DefWindowProc(IntPtr hWnd, WindowsMessages uMsg, IntPtr wParam, IntPtr lParam);

Public Shared Function DefWindowProc(ByVal hWnd As IntPtr, ByVal uMsg As WindowsMessages, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

WindowsMessages

The VirtualKeys (they're just mapped to the VK_* constants) and WindowsMessages enumeration have been omitted as it's quite lengthy.

For a C# enum see WindowsMessages

        public WindowsMessages Message;

    Public Message As WindowsMessages