I am currently working with a program which is supposed to run in the background but also check if "mod + o" is pressed then do something. But I cannot figure out how a vb.net program can listen to key presses when the program is not Selected / Opened.
You can use P/Invocation to be able to use WinAPI's GetAsyncKeyState() function, then check that in a timer.
<DllImport("user32.dll")> _ Public Shared Function GetAsyncKeyState(ByVal vKey As System.Windows.Forms.Keys) As Short End Function Const KeyDown As Short = &H8000 Private Sub Timer1_Tick(sender As Object, e As System.EventArgs) Handles Timer1.Tick If (GetAsyncKeyState(Keys.O) And KeyDown) = KeyDown Then 'Do whatever you want when 'O' is held down. End If End Sub
I cannot seem to find what the Mod key is, so you can do this in your form (when it has focus):
Private Sub Form1_KeyDown(sender As Object, e As KeyEventArgs) Handles Form1.KeyDown MessageBox.Show(Convert.ToInt32(e.KeyCode)) End Sub
Press the 'Mod' button ONLY, then take the number from the message box that popups and put it in the timer:
If (GetAsyncKeyState(<put number here>) And KeyDown) = KeyDown AndAlso (GetAsyncKeyState(Keys.O) And KeyDown) = KeyDown Then 'Do whatever you want when 'Mod + O' is held down. End If