void SetDateCallback(const Window *w, TimerGameEconomy::Date date, void *data)
Callback for when a date has been chosen.
void ShowSetDateWindow(Window *parent, int window_number, TimerGameEconomy::Date initial_date, TimerGameEconomy::Year min_year, TimerGameEconomy::Year max_year, SetDateCallback *callback, void *callback_data)
Create the new 'set date' window.