How to call the HiQPDF HTML to PDF .NET Library from a C++ Native Windows Application

				
//**************************************
// Name: How to call the HiQPDF HTML to PDF .NET Library from a C++ Native Windows Application
// Description:Answer to question: How can I use the .NET HiQPdf Library from a C++ Native Windows Application? 
<b>HiQPdf.com</b> library is a powerful and precise .NET library but it cannot be referenced directly into a native Windows application. 
You can register the HiQPdf classes for COM clients and produce a type library file by executing the following command in an Administrator command prompt: 
regasm HiQPdf.dll /tlb:HiQPdf.tlb 
The HiQPdf.tlb will be included in the C++ application code to offer the prototypes for HiQPdf classes and methods. The compiler will produce a C++ header file named HiQPdf.tlh from the TLB file, containing the HiQPdf library types and methods prototypes. 
The HiQPdf.dll and HiQPdf.dep files must be copied near the application executable or otherwise you have to install the HiQPdf.dll in GAC to make it available for COM infrastructure. 
The C++ code of a simple console application which converts an URL and saves the resulted PDF document to a file on disk looks like below:
// By: Stevnetk
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=13792&lngWId=3//for details.//**************************************

//see <a href="http://www.hiqpdf.com/demo/ConvertHtmlToPdf.aspx">html to pdf </a>
#include <windows.h>
#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;
}