pdfConvertToTIFF delphi 7

    Hello,


    I'm trying to convert a pdf file generated by Wpdf in tiff format with vpviewpdf3plus.

    I have installed wpviewpdf3plus version i have bought and i always have -1 when i try to convert a pdf.

    my licence is correct, my file is correct, i don't understand.

    here is my code :

    Code
    WpViewpdf3.WPViewPDFLoadDLL('wPDFViewPlus03.dll');
  n := WPViewPDF3.wpview_pdfConvertToTIFF(PAnsiChar(fnomedit),PAnsiChar(''), PAnsiChar(myLicName), PAnsiChar(MyLicKey), myLicCode, PAnsiChar(directory + '\Tiff\test.apf'), 1, 1, 0);

    can someone help me ?

    thanks