need help with the GetVolumeInformation function

I need help with the GetVolumeInformation function.
Below is the code I've been working with.
I'm hoping someone can save me some time in figuring this out.
Thanks in advance.:)

/* GetVolInfo.c */
/* to be used for interface with ForTran */

#include <windows.h>
#include <commctrl.h>
#include <stdio.h>
#include <string.h>

//#define MSGSIZE 80
//
LPCTSTR HD = "C:\";

//
void main(char *CSN)
//extern void GetVolInfo(char *CSN)
{
FILE *fptr;
fptr = fopen("TestGetVolInfo.txt", "w");

//
GetVolumeInformation(HD,
,
NULL,
CSN,
255,
NULL,
NULL,
FILE_READ_ONLY_VOLUME,
FAT,
NULL
);
fprintf(fptr,"C: Serial Number = %s",CSN);
return (0);
}

This is my latest. I've made some progress. I can get an executable and it gets me a value, but it doesn't look right to me.
I was expecting numbers and letters, but I'm getting something else. Also, I keep getting two compiler warnings for the FileSystemBuffer argument - "Suspicious pointer converstion" .
Would appreciate the help.

/* GetVolInfo.c */
/* to be used for interface with ForTran */

#include <windows.h>
#include <commctrl.h>
#include <stdio.h>
#include <string.h>

//#define MSGSIZE 80
//
LPCTSTR HD = "C:\\";
LPTSTR HDBUF,VNB;
LPDWORD MCL;
//int FSF=FS_FILE_COMPRESSION;
int FSF=FS_UNICODE_STORED_ON_DISK;
DWORD FSNB=255;
//
FILE *fptr;

void main(char *CSN)
//extern void GetVolInfo(char *CSN)
{


//
GetVolumeInformation(HD,
VNB,
255,
&CSN,
MCL,
&FSF,
HDBUF,
FSNB);
fptr = fopen("TestGetVolInfo.txt", "w");
fprintf(fptr,"C: Serial Number = %s",&CSN);
}


:)

Firstly, fix the

Code:

---

void main(char *CSN)

---

There's so much wrong with that...........

Anyway....heres a working example

Code:

---

#include <windows.h>
#include <iostream>
using namespace std;

int main(void)
{

LPCTSTR szHD = "C:\\";
UCHAR szFileSys[255],szVolNameBuff[255];
DWORD dwSerial,dwMFL,dwSysFlags;
BOOL bSuccess;

bSuccess = GetVolumeInformation(szHD,(LPTSTR)szVolNameBuff,
                                        255,&dwSerial, &dwMFL,&dwSysFlags,
                                        (LPTSTR)szFileSys,255);

if(!bSuccess){
        cout << "Error number " << GetLastError() << endl;
        return 1;
}
if(szVolNameBuff[0] == NULL)
cout << "Vol Name not present" << endl;
else
cout << "Vol Name is " << szVolNameBuff << endl;
cout << "Vol Serial is " << dwSerial << endl;
cout << "Max Filelength is " << dwMFL << " chars" << endl;
cout << "Filesystem is " << szFileSys << endl;


return 0;
}

---

Just wanted to say thanks for the code Fordy.
It worked out pretty good.:D ;)