namespace JunoComposer {

//declaration of an enum for the whole namespace...........
public enum Midmod :byte {run,stop,rewind}; //<<<<<<<<<

// use it anywhere to give it as  parameter to a function (playmid) ...........
midireplay.playmid(midireplay.lastmidnam, Midmod.rewind); //<<<<<<<<<

// or use it for another case ....
midireplay.playmid(midireplay.lastmidnam,Midmod.run); //<<<<<<<<<


internal class midireplay {

// receive it as parameter in a function................
internal static void playmid(string finam, Midmod mimo) { //<<<<<<<<<
  //do something same for every kind of midiereplay 
  if (midionline.lasttone!=0) {
    midionline.play1tone(0);
    MidiPlayer.CloseMidi(); 
    ..
    ..
  } 

  // evaluating the enum-parameter......	
  if (mimo==Midmod.run) {midireplaying=true; mc.Run();} //<<<<<<<<<
  if (mimo==Midmod.stop){midireplaying=false;  mc.Stop();}
  if (mimo==Midmod.rewind) {mc.Stop(); mc.RenderFile(finam); }
}