Keystroke events are supported for the ENTER, ESC, and CTRL keys, which are handled by onOK, onCancel, and onCtrlKey respectively. The function keys are treated as CTRL keys.

<zk>
	<grid width="400px">
		<rows>
			<row>
				Password
				<textbox id="inp" ctrlKeys="^a#f8" type="password" value="123456789" width="150px">
					<attribute name="onOK"><![CDATA[
						Messagebox.show("ENTER key is pressed", "OK", 
								Messagebox.OK, Messagebox.EXCLAMATION);
						self.focus();
					]]></attribute>
					<attribute name="onCancel"><![CDATA[
						Messagebox.show("ESC key is pressed", "CANCEL", 
								Messagebox.OK, Messagebox.EXCLAMATION);
						self.focus();
					]]></attribute>
					<attribute name="onCtrlKey"><![CDATA[
						int keyCode = ((KeyEvent) event).getKeyCode();
						String s = "";
						switch(keyCode){
							case 65: s = "Ctrl+A";break;
							case 119: s = "F8";break;
						}
						Messagebox.show(s+" is pressed", "CtrlKey", 
								Messagebox.OK, Messagebox.EXCLAMATION);
						inp.focus();
					]]></attribute>
				</textbox>
			</row>
		</rows>
	</grid>
	<zscript><![CDATA[
		inp.focus();
	]]></zscript>
</zk>