🚀 go-pugleaf

I'm trying to simulate the KeyEvent for (Alt)(PrintScreen)
I have code working but can't figure out how to set the correct
value for keyChar.  Does anyone know the keyChar values for
the (Alt) and (PrintScreen) keys?  Below is the code I use.

thanks

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 System.out.println("!!! COPY to clipboard !!!");
 long evtTime = System.currentTimeMillis();
 keyCode = KeyEvent.VK_ALT;     // ALT keyCode
 keyChar = KeyEvent.VK_ALT;     // ?????????????????????? <<<<<<<<
 KeyEvent evt1 = new KeyEvent(this, KeyEvent.KEY_RELEASED,
            evtTime, KeyEvent.KEY_RELEASED, keyCode, keyChar);
 dispatchEvent(evt1);
 keyCode = KeyEvent.VK_PRINTSCREEN;    // PRINTSCREEN keyCode
 keyChar = KeyEvent.VK_PRINTSCREEN;    // ??????????????????? <<<<
 KeyEvent evt2 = new KeyEvent(this, KeyEvent.KEY_RELEASED,
            evtTime, KeyEvent.KEY_RELEASED, keyCode, keyChar);
 dispatchEvent(evt2);

 System.out.println("!!! ALT PRINTSCREEN Events sent !!!");
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