Detect hotkeys from fullscreen game - vb.net

Question

I've made an overlay extension for a fullscreen game. I want to activate different commands using hotkeys while in the game. I used to use GetAsyncKeyState and then use a timer to constantly check if the KeyState has changed. I then switched to using a RegisterHotKey function like the one shown below:
Imports System.Runtime.InteropServices
Public Class Form1
Public Const MOD_ALT As Integer = &H1 'Alt key
Public Const MOD_CONTROL As Integer = &H2 'CTRL key
Public Const MOD_SHIFT As Integer = &H4 'Shift key
Public Const MOD_NOREPEAT As Integer = &H4000 'NoRepeat
Public Const MOD_WIN As Integer = &H8 'Windows key
Public Const WM_HOTKEY As Integer = &H312
<DllImport("User32.dll")>
Public Shared Function RegisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) As Integer
End Function
<DllImport("User32.dll")>
Public Shared Function UnregisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer) As Integer
End Function
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
RegisterHotKey(Me.Handle, 1, MOD_CONTROL + MOD_ALT + MOD_NOREPEAT, Keys.D)
RegisterHotKey(Me.Handle, 2, MOD_ALT, Keys.C)
End Sub
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.Msg = WM_HOTKEY Then
Dim id As IntPtr = m.WParam
Select Case (id.ToString)
Case "1"
MessageBox.Show("You pressed CTRL+ALT+D key combination")
Case "2"
MessageBox.Show("You pressed ALT+C key combination")
End Select
End If
MyBase.WndProc(m)
End Sub
Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
UnregisterHotKey(Me.Handle, 1)
UnregisterHotKey(Me.Handle, 2)
End Sub
End Class
This works perfect, and I'm able to use the noRepeat to only fire the function once even if i hold down the hotkeys, which is something i struggled with while using the GetAsyncKeyState and a timer. My problem is that the form wont registrer the keys being pressed when I'm inside the game. When I'm in any other program which isnt running in fullscreen it detects the hotkeys just fine. Should i go back to the GetAsyncKeyState or is there another way of detecting hotkeys even when inside a full screen game?