A和B的区别是什么

[中华小虾]

大虾们好，

       请问附件这两个引用句柄A、B。为什么A可以创建严格类型属性节点，B不能呢。A是我从其它vi上复制过来的。应该没什么影响吧。不知道A和B的区别在哪里？A是如何设置的？ 见附件。

     谢谢！

[jyang72211]

For A, you included the data type.  For B, you didn't include the date type. 

To make B 严格类型属性, just drag and drop the appropriate control into the reference control.  See attached file for an example.  In the example, I dragged and dropped the Numeric control into the reference control.  This will make it 严格类型属性. 

[中华小虾]

hello~

   Thank you for your help.