Thread: How to call html to pdf asp.net library from a C++ Native Windows Application.

First you should 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:

Code:

#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;
}

here are the html to pdf demo applications for HiQPDF Library with source code in C# and VB

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