Sets whether to use underlines as mnemonics.
If true, an underline in the text of the button label indicates the next character should be used for the mnemonic accelerator key.
%TRUE if underlines in the text indicate mnemonics
See Implementation
Sets whether to use underlines as mnemonics.
If true, an underline in the text of the button label indicates the next character should be used for the mnemonic accelerator key.