输入控件限制类型一例，Delphi源码，本源码将输入控件限制为只允许输入浮点数类型，其它类型将不予通过，可输入小数或整数，其它类型无反应。-The type of input controls to limit one case, Delphi source code, the source of the input control limit is only allowed to enter the floating-point type, the other type will not be