因为手机短消息的发送是以PDU串的形式发送出去的，中文字符以Unicode码来表示，所以在发送中文短消息之前必须首先将中文字符转换为Unicode码，下面的函数将实现这个功能。这个函数主要应用到VB自带的一个格式转换函数：ChrW（）将中文转换为Unicode码。-Because the mobile phone short message sending PDU is sent the form of strings, and Chinese characters to Unicode code expressed in the Chinese short message sent before the Chinese characters must first be converted to Unicode code, the following function to achieve this function. The main function is applied to a VB own format conversion function: ChrW () will be converted to Unicode Chinese code.