How to get pointer to data in memory

For our software we need a new component for opening pdf.
We want to know if it possible with quickpdf to open pdf and :
If the pdf has only an image get the pointer to data in memory
If the pdf is a vector transform it to an image and get the pointer to data in memory

How to do this ?

thanks for your help
We use the latest version of quickpdf

thanks for your answer, I found the solution by using the function RenderPageToString.
after I convert the String to Hglobal and I can load the image with our SDK.

Now I need to get the dpi used in the pdf or image for the function RenderPageToString.
I try the function ImageHorizontalResolution but I allways get the value 0

Do you know how to get the dpi resolution ?

for example :
                    int filehandle  =debenudll->LoadFromFile(strFileName, szPWD);
                    int numPages = debenudll->PageCount();
                    int numImages = debenudll->FindImages();
                    for (int i = 1; i <= numPages; i++)
                    {
                        for (int j = 1; j <= numImages; j++)
                        {
                            int idxImage = debenudll->GetImageID(i);
                            int nTest =debenudll->SelectImage(idxImage);
                            int nRes = debenudll->ImageHorizontalResolution();
                            nRes = debenudll->ImageHeight();//this function works

                        }
                  }