Question: Simple graphical interface in Maple

How i need to write 

>teksbiasa:=`Hello! Bob`;

in button Action When Clicked at simple graphical interface instead of


because when i enter Hello! Bob in %txtTeksBiasa, system pop up ERROR



Error in Component button with caption "Botton":

(in unknown) incorrect syntax in parse: missing operator or

`;`(near 7th character of parsed string)


Thank you~=]]

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