Delphi:DelphI控制PC内置喇叭发出声音，也就是控制机箱里内置的蜂鸣器发出叫声，知道是怎么实现的么？本源码将告诉你答案。 -Delphi: DelphI control PC internal speaker sound, which is controlled chassis built buzzer sounds, know how to achieve it? The source will tell you the answer.