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