KXL_CheckEvents -- It checks to see the event occurred.

Bool KXL_CheckEvents(void);

True = The event generated.
False = The event is not generated.

#include <KXL.h>

int main(void)
{
  KXL_CreateWindow(100, 100, "kxl.org", KXL_EVENT_KEY_PRESS_MASK);

  while (KXL_CheckEvents() == False);  
  KXL_DeleteWindow();
  return 0;
}