@marcick Yes it would be nice if you share what you find as files name , there maybe a better methods that i still believe its exist some where sense i see other b4a apps detects many other emulators .
Private Sub isBlueStack As Boolean
Dim r As Boolean
If (File.Exists(File.DirRootExternal,"Android/data/com.bluestacks.home") = True) Then
r = True
Else
r = False
End If
Return r
End Sub