VB6 code to convert a pdf file to a tif file

I am looking for code (or a dll) that will allow me to convert pdf files to tif files from within a Visual Basic 6.0 application. The resulting tif files must be identical to the original pdf file, including color files. This code or dll must be freely distributable by me. I do not care if you use third-party code, such as ghostscript, just as long as it free to distribute within my application.