Fill *bpt with information about the breakpoint set at ea. If no breakpoint is set at ea, false is returned. If *bpt is NULL, this function simply returns true or false depending if a breakpoint is set at ea.
#include <kernwin.hpp> // For get_screen_ea() definition
if (get_bpt(get_screen_ea(), NULL))
msg("Breakpoint is set at %a.\n", get_screen_ea());
msg("No breakpoint set at %a.\n", get_screen_ea());