Just as suggested, it depends on which 'box' or input you click into. A basic Text input box will not natively support unicode key input unless it is 'overridden'.
A Richedit input box supports a bit more to support a more WYSIWYG interface. So the designers decided to support unicode manual input characters.
Great observation and hope you understand.
Oh, and I am unsure exactly what mIRC uses for the text input box, so I cannot answer that question. Maybe argv0 can answer if it is an overridden class of a textbox, a textbox, or some form of richedit class.
Last edited by extremity; 18/04/13 06:03 AM.