【6-1】设计一个窗口,在该窗口中练习键盘的响应,要求如下: 1)单击键盘上的向上箭头时,窗口中显示“ You had hitted the up key (2)单击< Shift>键时,窗口中显示“ You had hitted the shift key” (3)单击<Ctr>键时,窗口中显示“ You had hitted the ctrl key” (4)单击<CtrH+A>键时,窗口中显示“ You had hitted the ctrl a key” (5)单击<Shif+B>键时,窗口中显示“ You had hitted the shift b key' 键盘实例程序 You had hitted the SHIFT B key【6-1】 设计一个窗口，在该窗口中练习键盘的响应，要求如下： (1) 单击键盘上的向上箭头时，窗口中显示“You had hitted the up key” (2) 单击<Shift>键时，窗口中显示“You had hitted the SHIFT key” (3) 单击<Ctrl>键时，窗口中显示“You had hitted the CTRL key” (4) 单击<Ctrl+A>键时，窗口中显示“You had hitted the CTRL A key” (5) 单击<Shift+B>键时，窗口中显示“You had hitted the SHIFT B key