Installing a driver programmatically using INF file C++

Hi, could someone here please let me know how to install 3rd party device drivers
programmatically if all the required files i.e. inf file, .sys etc are provided. The
minimum operating system this solution SHOULD work on is Windows2000.

I tried copying the .inf file into the Win Folder\INF folder and the sys file
into the Win folder\system32\drivers but each time plug in the device, windows
pops up Found New Hardware user interface which is what i am trying to avoid.

Below is something i tried but the function returns error 87 (The parameter is incorrect).

Thanks.

HINF HInf;
UINT ErrorLine;
BOOL bRes = FALSE;
PBOOL FileWasInUse = FALSE;

LPCSTR szSourceFileName = _T("C:\\Drivers_HypercomP1320\\hypvcpusb.inf");
LPCSTR szInfFileName = _T("hypvcpusb.inf");
PVOID Context = NULL;

HInf = SetupOpenInfFile ( szSourceFileName, NULL, INF_STYLE_WIN4, &ErrorLine);

LPCSTR SourceFile = ("hypvcp.sys");
LPCSTR SourcePathRoot = _T("C:\\Drivers_HypercomP1320");
LPCSTR DestinationName = _T("C:\\WINDOWS\\system32\\drivers\\hypvcp.sys");

bRes = SetupInstallFileEx ( HInf, NULL, SourceFile, SourcePathRoot, DestinationName, SP_COPY_FORCE_IN_USE,
(PSP_FILE_CALLBACK)CopyMsgHandler, Context, FileWasInUse);

DWORD dwVal = GetLastError();

SetupCloseInfFile(HInf);

// Callback function
UINT CopyMsgHandler (UINT Context, UINT Notification,UINT_PTR Param1, UINT_PTR Param2)
{
UINT rtnValue = NO_ERROR;
return rtnValue;
}