Re: listbox updating problem

Your routine to read the port is probably blocking the messaging. You could
put the query routine in a thread and post messages to the UI that updates
the listbox, or put something in your reading loop like:

//
// Release main thread for background processing
//
void GiveTime()
{
 // Idle until the screen redraws itself, et. al.
 MSG msg;
 while (::PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) ) {
  if (!AfxGetThread()->PumpMessage( )) {
   ::PostQuitMessage(0);
   break;
  }
 }
 // let MFC do its idle processing
 LONG lIdle = 0;
 while (AfxGetApp()->OnIdle(lIdle++ ))
  ;
}

to allow messages to be processed at different times. You could do
something like:

while(myDataIsBeingRead) {
    ReadOneBlockOfData();
    UpdateListBox();
    GiveTime();
}

Tom
"Z.K." <nospam@nospam.net> wrote in message
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