RJ10DLL::OpenReceiver

BOOL OpenReceiver( HWND mainwnd, char *maindir, UINT PID );

Return Value

  if  -1  RadioJet is not properly in the USB-Port, poor contact, remove the device and connect it again
  if   1  RadioJet is ready
  else the RadioJet is not ready.

Parameters

     HWND mainwnd
     this is the message window for all the main frame commands like:
     WM_HID_JET_ADD
     WM_HID_JET_REMOVE

     char *maindir
     if this NULL, the we set only the mainwnd and come back , because the window did not exist previously,
     otherwise the DLL is installed and the working directory is set to that name.

     UINT PID 
     for the default ID set PID = NULL,
     but it may be you have a different PID, such as a 2nd RadioJet.

 Remarks

      this is the first call to connect the Receiver.