How can I use a HTML to PDF .NET Library from a C++ Native Windows Application

#include <iostream>
#import "HiQPdf.tlb" raw_interfaces_only
 
using namespace HiQPdf;
int main()
{
CoInitialize(0);
{
// create the HTML to PDF converter
_HtmlToPdfPtr htmlToPdfConverter(__uuidof(HtmlToPdf));
 
// get a reference to the PDF document control object from converter
_PdfDocumentControl * pdfDocumentControl;
htmlToPdfConverter->get_Document(&pdfDocumentControl);
 
// set PDF page orientation
pdfDocumentControl->put_PageOrientation(PdfPageOrientation_Portrait);
 
// set PDF page margins
_PdfMargins* pdfMargins;
pdfDocumentControl->get_Margins(&pdfMargins);
pdfMargins->put_Left(10);
pdfMargins->put_Right(10);
pdfMargins->put_Top(10);
pdfMargins->put_Bottom(10);
 
// create the URL to convert and output PDF file name strings
BSTR urlToConvert = SysAllocString(L"http://www.google.com");
BSTR outPdfFile = SysAllocString(L"out.pdf");
 
// call the converter to convert the HTML document to a PDF file
htmlToPdfConverter->ConvertUrlToFile(urlToConvert, outPdfFile);
 
// free the allocated strings
SysFreeString(urlToConvert);
SysFreeString(outPdfFile);
}
CoUninitialize();
 
return 0;
}