简易计算器，可进行简单的加、减、乘、除功能，能弹出软键盘，也可设置定时。-Simple calculator, can be a simple addition, subtraction, multiplication, division function, can pop up the soft keyboard can also set the timer.

vb软键盘输入频率50赫兹 不是数字报错 是数字不大于50-vb soft keyboard input frequency of 50 Hz is not numeric error is not more than 50 figures