看来实现转换的函数是 LCMapString,
The LCMapString function either maps an input character string to another using a specified transformation or generates a sort key for the input string.
其参数
LCMAP_SIMPLIFIED_CHINESE,LCMAP_TRADITIONAL_CHINESE 来完成这个任务。
LCMAP_SIMPLIFIED_CHINESE Windows NT 4.0 and later: Maps traditional Chinese characters to simplified Chinese characters.
LCMAP_TRADITIONAL_CHINESE Windows NT 4.0 and later: Maps simplified Chinese characters to traditional Chinese characters.