How to Replace Standard PO PDF document with Custom PDF which is generated by custom program

Hi All,

We are having a business requirement to create a custom PO PDF document which requires a merged PDF document with all attachments from PO header and line level, Supplier, Item and quality modules. We created a custom program to achieve this requirement. Now we need to replace the standard PO PDF document which is generated by standard workflow with the custom PDF document.

Issue : While opening the View PDF from Buyer work center Standard PDF is Opening. To overcome this we are planning to replace standard PDF with custom PDF.

Please help us to resolve this issue. Thanks in advance.