 TTY: Demonstrates Basic Microsoft(R) Windows(TM)
 Communication Functions

 TTY demonstrates the Microsoft(R) Windows(TM) communication 
 functions OpenComm, SetCommState, WriteComm, ReadComm, 
 SetCommEventMask, GetCommEventMask, CloseComm, and the new 
 Windows version 3.1 function EnableCommNotification.

 TTY uses the WM_COMMNOTIFY message by either enabling the 
 EV_RXFLAG event flag and the CN_EVENT notification, or by 
 using CN_RECEIVE to receive trigger thresholds for 
 detecting the characters received. The Windows version 3.1 
 COMM.DRV posts the WM_COMMNOTIFY message to the associated 
 windows when the necessary events occur. TTY performs 
 simple character translation and implements a screen buffer 
 for use as the I/O window.

 Use the Settings menu to change the port, baud rate, data 
 bits, parity, stop bits, and handshaking options (RTS/CTS, 
 DTR/DSR, and XON/XOFF). After setting these communication 
 options, use the Action menu to connect or disconnect the 
 TTY program.

 TTY was built and tested under Microsoft Windows version 
 3.1.
