一个计算机击鼓器。此程序让您用47种不同的打击乐器的声音来构造最大到32个音符的一个序列，然后在选择的速度和音量下反复演奏这个序列。(Charles Petzold，Programming Windows 上面的）-drum for a computer. This program lets you use 47 different types of percussion instruments voice to the largest structure to 32 notes of a sequence, then the choice of speed and noise performance under repeated this sequence. (Charles Petzold, Programming Windows above)