VFP和SQL中把汉字转换成拼音首字母的函数-in VFP and SQL ,Convert chinese characters into the function of the first letters of the alphabet

自编拼音函数，获取输入汉字的第一个字母，主要应用于按照首字母检索和查找。-Self Pinyin function for the first letter of the input of Chinese characters, mainly used in accordance with the first letter of retrieval and Find.