View Output Button Code change

Dear all,

I have a bit challange here I want to avoid some request to print twice, Actually we have oracle r12 and installed on solaris 10. Printer is installed on client and shared after

that configured on solaris but not printed in well format(Epson Printer). So our consultant advise to get network printers that really increase our cost too much , To avoid

such cost I write some code behind the View Request button(in standard form) and it is giving me my requirement. I know it is not recomended to change the standard form

Although there is not too much modfication. Is there any clue to do such in such circumstances.