notepad type remapping key like type a print b, type c print g using vb.net

Imports System.Runtime.InteropServices
Public Class Form1
    Private Const WH_KEYBOARD_LL As Integer = 13
    Private Const WM_KEYUP As Integer = &H101
    Private Const WM_SYSKEYUP As Integer = &H105
    Private proc As LowLevelKeyboardProcDelegate = AddressOf HookCallback
    Private hookID As IntPtr
    Private Delegate Function LowLevelKeyboardProcDelegate(ByVal nCode As Integer, ByVal wParam As IntPtr, _
        ByVal lParam As IntPtr) As IntPtr

    <DllImport("user32")> _
    Private Shared Function SetWindowsHookEx(ByVal idHook As Integer, ByVal lpfn As LowLevelKeyboardProcDelegate, _
        ByVal hMod As IntPtr, ByVal dwThreadId As UInteger) As IntPtr
    End Function

    <DllImport("user32.dll")> _
    Private Shared Function UnhookWindowsHookEx(ByVal hhk As IntPtr) As <marshalas(unmanagedtype.bool)> Boolean
    End Function

    <DllImport("user32.dll")> _
    Private Shared Function CallNextHookEx(ByVal hhk As IntPtr, ByVal nCode As Integer, ByVal wParam As IntPtr, _
        ByVal lParam As IntPtr) As IntPtr
    End Function


    <DllImport("kernel32.dll", CharSet:=CharSet.Unicode)> _
    Private Shared Function GetModuleHandle(ByVal lpModuleName As String) As IntPtr
    End Function

    Sub New()
        InitializeComponent()
        Text = "KeyboardPlus 1.01"
        hookID = SetHook(proc)
    End Sub

    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As FormClosingEventArgs) Handles Me.FormClosing
        UnhookWindowsHookEx(hookID)
    End Sub

    Private Function SetHook(ByVal proc As LowLevelKeyboardProcDelegate) As IntPtr
        Using curProcess As Process = Process.GetCurrentProcess()
            Using curModule As ProcessModule = curProcess.MainModule

                Return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0)

            End Using
        End Using
    End Function

    Private Function HookCallback(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
        ' "The WM_KEYUP message is posted to the window with the keyboard focus
        ' when a nonsystem key is released. A nonsystem key is a key that is pressed when the ALT key is not pressed,
        ' or a keyboard key that is pressed when a window has the keyboard focus." 
        

        If nCode >= 0 AndAlso (wParam.ToInt32 = WM_KEYUP OrElse wParam.ToInt32 = WM_SYSKEYUP) Then
            Dim vkCode As Integer = Marshal.ReadInt32(lParam)
            'vkCode = Keys.B
            If vkCode = Keys.A Then
                'SendKeys.Send(vbBack)
                If Console.CapsLock = True Then
                    SendKeys.Send("B")
                    'vkCode = Keys.B
                Else
                    'vkCode = Keys.B
                    SendKeys.Send("b")
                End If

            End If
        End If
        Return CallNextHookEx(hookID, nCode, wParam, lParam)
    End Function

End Class>