大家帮帮小弟我如何把powerbuilder代码转换成delphi代码

大家帮帮我怎么把powerbuilder代码转换成delphi代码；
Public Function string encodex (ref string pchar) LIBRARY "passwd.dll" ALIAS FOR "Encodex;Ansi"
Public Function string unencodex (ref string pchar) LIBRARY "passwd.dll" ALIAS FOR "UnEncodex;Ansi"

我要把上面代码变成delphi代码，都是外部dll调用中用的，怎么变？

[解决办法]
public function encodx(ref:String):String;stdcall; external 'passwd.dll';
[解决办法]
function encodx(ref:pchar):string;stdcall;external 'passwd.dll';