一个很好的软键盘程序。利用getforgroundwindow得到当前窗口，找到焦点。这程序唯一的缺点是：acvtive窗口焦点，不能应用。但是单线程技术比较简单。-A good soft keyboard program. Use getforgroundwindow get the current window, find the focus. This procedure only drawback is: acvtive window focus, can not be applied.