求修改文件名的的API
求API或的思路！
[解决办法]
试一下这个:

1,定义扩展函数:
Function ulong MoveFile(ref string lpExistingFileName,ref string lpNewFileName) LIBRARY "kernel32.dll" ALIAS FOR "MoveFileA"


2,引用:

string o,n

o = 'c:\KwDownload\aa.xls'
n = 'c:\KwDownload\b.xls1'
movefile(o,n)