Win98中两个参数无效,在有声卡的情况下是在声卡中发默认声,否则在PC Speaker中发默认的“嘀嘀”Beep声。
在NT中:
参数1: Specifies the frequency, in hertz, of the sound. This parameter must be in the range 37 through 32,767 (0x25 through 0x7FFF).
参数2:Specifies the duration, in milliseconds, of the sound.