This code lets you use hotkeys from your program. Even if your app is not in focus the hotkey will work. This one is CTRL + A
Also to change the Keys you will probably need the Virtual Key codes
They Are Here
VB.NET Code:
  1. Private Declare Function RegisterHotKey Lib "user32" (ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) As Integer
  2.     Private Declare Function UnregisterHotKey Lib "user32" (ByVal hwnd As IntPtr, ByVal id As Integer) As Integer
  3.  
  4.     Private Const WM_HOTKEY As Integer = &H312
  5.  
  6.     Private Const MOD_ALT As Integer = &H1
  7.     Private Const MOD_CONTROL As Integer = &H2
  8.     Private Const MOD_SHIFT As Integer = &H4
  9.  
  10.     Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
  11.         UnregisterHotKey(Me.Handle, 0)
  12.     End Sub
  13.  
  14.     Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  15.         RegisterHotKey(Me.Handle, 0, MOD_CONTROL, Asc("A"))
  16.     End Sub
  17.  
  18.     Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
  19.  
  20.         If m.Msg = WM_HOTKEY Then
  21.            If m.WParam = 0 Then
  22.             'CODE HERE
  23.            End if
  24.         End If
  25.         MyBase.WndProc(m)
  26.  
  27.     End Sub