How to extract a specified file in a .zip file

[fxtfxt2008]

the following code where the errors

struct{ 
 long dwLowDateTime 
 long dwHighDateTime 
}FILETIME
struct {
 long Index 
 long Attributes 
 FILETIME AccessTime 
 FILETIME CreateTime
 FILETIME ModifyTime 
 long CompressedSize 
 long UncompressedSize
 char Name[260]
}zipEntry
//==========================
var unLiteZip = getAdditionalFile("LiteUnzip.dll");
dllimport unLiteZip stdcall long UnzipOpenFileA(long*,String ,String); 
dllimport unLiteZip stdcall long UnzipGetItemA(long,zipEntry*) ;
dllimport unLiteZip stdcall long UnzipItemToFileA(long,String,zipEntry*)
dllimport unLiteZip stdcall long UnzipFindItemA(long,zipEntry*,long)
dllimport unLiteZip stdcall long UnzipClose(long)
dllimport "kernel32" stdcall long lstrcpy(char*,char*) 
//===============================
function unzipFind(){
var obj=new Object
obj.value=0
//----------open zip
UnzipOpenFileA(obj,"c://test.zip",0) 
var hanl=obj.value
trace(hanl)
//----------structure
var myStruct = new Struct(zipEntry);
obj.value=myStruct
//--------lstrcpy
trace(lstrcpy(obj.value.Name,"test.txt"));//undefined

//--------UnzipFindItemA
trace(UnzipFindItemA(hanl,obj,0)); // Can't find the specified file in the zip
//---------UnzipItemToFile
trace( UnzipItemToFileA(hanl,obj.value,obj))// Bad arguments passed
//--------
UnzipClose(hanl);
 }

dear SWFKit! i'm very sorry for bothering you again! please tell me what am i doing wrong.

[SWFKit]

I'm not sure. Maybe "lstrcpy" should be "lstrcpyA"? Or you can write you own lstrcpy function

function myStrCpy(obj, str)
{
  for (var i = 0; i < str.length; i++)
  {
    obj.value.Name[i] = str[i];
  }
  obj.value.Name[i] = 0;
}