DLL调用问题

Question

DLL函数申明如下
function Get_SendResult( messageID: pchar; donetime: pchar; isdnnum: pchar; destaddr: pchar; wresult:pinteger ): integer; stdcall; external 'smsapi211.dll';
其中messageID,donetime,,isdnnum,destaddr,wresult都是输出形参数
请问我应该申明什么样的参数来调用这个函数呢?

Answer 1

messageID:array[0..IdLen] of char;
 donetime:array[0..donetimelen] of char; 
isdnnum:array[0..isdumlen] of char; 
destaddr:array[0..destlen] of char; 
wresult:integer;

Answer 2

var
messageID,donetime,isdnnum,dstaddr:pchar;
wresult:Integer;

Answer 3

var
messageID,donetime,isdnnum,dstaddr:pchar;
wresult:Integer;