https://msdn.microsoft.com/de-de/library/windows/desktop/dd375731%28v=vs.85%29.aspx

key_value.pdf

In einem Modul:

Public Const SHIFT_KEY = &H10    'Shift
 
#If VBA7 Then
    Declare PtrSafe Function GetKeyState Lib "USER32" (ByVal vKey As Long) As Integer
#Else
    Declare Function GetKeyState Lib "USER32" (ByVal vKey As Long) As Integer
#End If

Und im Code kann man dann einfach prüfen, zBsp ob diue Shift-taste gedrückt ist.

If GetKeyState(SHIFT_KEY) < 0 Then MsgBox "Shift key is pressed"