第四个参数是一个字元串，即一个将显示在数据项右边的标签。
Fourth param is a string, a label to be displayed on the right of the element.
密码单元选项，以显示密码明文。第四个参数是一个数组或属性字元串。
A password element with option to show the password in plaintext. Fourth param is an array or string of attributes.
例如，如果块长度为64位，而最后的块只包含40位，则会添加24位的填充字元串。
For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added. see the.
检索库的文档字元串、完整的帮助文件名和路径以及帮助文件中的库帮助主题的上下文标识符。
Retrieves the librarys documentation string, the complete help file name and path, and the context identifier for the library help topic in the help file.
两种宽度的字元在单一字串里混和，因此您必须记得检查前导位元组。
Characters of both widths are mixed in a single string; therefore, you must remember to check for lead bytes.
传回包含来自于某一字串之指定字元数量的字串。
Returns a string containing a specified number of characters from a string.
传回包含来自于某一字串之指定字元数量的字串。
Returns a string containing a specified number of characters from a string.
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