How to extract tevent from deval

function main
  tstart = 0.0;
  tend = 100.0;
  options = ddeset('Events',@events);
  sol = dde23(@ddex1,2,[0.7],[tstart tend],options);
  tint = linspace(tstart,tend,1000);
  yint = deval(sol,tint);
  tevent = ??  %this is what i want to calculate.
end
function dydt = ddex1(t,y,Z)
  ylag = Z(:,1);
  dydt = y*ylag*(1-y);
end
function [value,isterminal,direction] = events(t,y,Z)
  value(1) = y(1)-0.99;
  isterminal(1) = 0;
  direction(1) = 1;
end

This is my code. but I first want to solve dde then want to evaluate the structure. Then i want to extract tevent from tint.