Der Thread ist zwar schon älter,
allerdings auf die Sandboxie Frage:
Code:
Public Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleA" (ByVal lpModuleName As String) As Long

Public Sub Sandboxed()
Dim hMod As Long

hMod = GetModuleHandle("SbieDll.dll")

If hMod = 0 Then
    MsgBox "Not Sandboxed"
        Else
    MsgBox "Sandboxed"
End If

End Sub