command to unknown application? my question is that i have an application built in php running in a hospital.The hospital is also using many other applications.in my application their is an scan applet which scan the print document and save in the specified folder.the printed document is from another application which our applet scan.Now they want that they don't have to scan the document.they want to send print command to the application from my application.so please reply me that i have to write an virtual printer for that.if yes then how.please reply soon