dll function declare 问题
Public Function string GetKeys (ref string key1,ref string key2) "Encrypt.dll "
在delphi中明。
Function GetKeys (key1:pchar , key2:pchar)：string "Encrypt.dll "
为何报错，pb调用函数正常

[解决办法]
Function GetKeys(key1:pchar , key2:pchar)：pchar;stdcall; external "Encrypt.dll ";