C＋＋Builder中用到的输入金额的控件，该控件会检查输入字符，只允许输入数字和小数点，当小数点前面的数字满三位（该值为控件的属性，可设置）时自动添加逗号。-C + + Builder to use the amount of import controls, the controls will check the importation of characters, allowing only input numbers and decimal point, when the decimal point in front of three full (the value of the control attributes can be set) automatically add a comma.