Function choice2_default

pub fn choice2_default(txt: &str, b0: &str, b1: &str, b2: &str) -> Option<i32> 

Available on crate feature dep_fltk only.

Displays a choice box with up to three choices. An empty choice will not be shown. Closing the dialog returns None. Choosing a value returns its index from the arguments. The dialog is positioned at the pointer hotspot