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.

For a C# enum see WindowsMessages

        public WindowsMessages Message;

    Public Message As WindowsMessages

    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.

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"/>.