PDFCreator issues


Recently, I made a c# program that uses PDFCreator to convert a word program into a pdf.  It works fine, however when the program isn't on focus then PDFCreator sits there using 50% CPU performance and doesnt do anything.  Its only when focus is regained does the program resume working again..  I was wondering if this is a known issue and wheather or not you guys found a fix to it.  I appreciate you helping me.