Keystroke Mnemonics—3270 and 5250 SendKey Functions
You can use the following Special Key strings to create key strings using the ESC character.
These mnemonics are used by EHLLAPI/WinHLLAPI SendKey (3), DDE Poke Keystroke item, and Host Keys method to press special 3270 functions keys. All special keys are available by using the command delimiter @ (the ESC character). For example, you can send an Enter command to the host by sending the @E string and you can send a normal @ symbol by sending two @@ symbols.