If you have a Mac you can install Printopia on it. With that installed you can print from any app that supports printing to any printer or Dropbox of your Mac. The down side is that your Mac has to be on to print.
On the computer. Basically what it does is enable AirPrint on a wireless printer that isn't supported by Apple. I have a non-supported Canon printer, so I use handyPrint (AirPrint Activator) to on my Mac.
There are tons of these programs available for Mac and PC. You can install it on either one of your computers. They don't have to be connected to the printer with a cable. As long as it's a wireless printer, you're good to go.
Thanks I downloaded the trial ATM but I cant see ho it makes a paper copy only to the pc or drobox which i've done . But as I say I'm not knowing how it makes paper copies if it does that its just right. and thanks both for your help so far .
Printer Pro is a paid app with a free lite version for testing to see if you can use it with your wifi connected printer. It worked for me so I purchased it. They have an iPhone version as well as an iPad version. Our newer ePrint HP printer isn't as reliable for me as the older printer which is why I'm using this app instead of that printer.