说明：  用VB制作模拟电子琴-使用了一个DLL控件：模拟电子琴.dll，有中文讲解方法，比网络上的英文版容易懂。请注意:在创建了自己的电子琴之后DLL自带的电子琴会出现错误。关于编译前不关闭为什么会出错的原因:电子琴只能打开一个，在Windows系统中EXE程序关闭后它所打开的数据会自动销毁，电子琴也会被销毁,,在编译前我们关闭窗口其实系统不把他当做关闭，因为我们的窗口是跟VB6.EXE一起的,我们关闭的只是工程窗口，所以电子琴是不被销毁的!这样我们下次运行时就会产生同时打开2个电子琴的情况
(VB produced simulated keyboard- uses a DLL controls: analog keyboard dll, there are Chinese to explain the method, than the English on the network easy to understand. Please Note: After you create a DLL that comes with its own keyboard keyboard error occurs. About before compiling reasons why not to close the error: keyboard can only open one, in the Windows system shut down after it opened EXE program data is automatically destroyed organ will be destroyed, before compiling our system does not actually close the window him as close as we are with VB6.EXE window together, we just closed the project window, so the keyboard is not being destroyed! so next time we will have open at 2 keyboard case runtime)