Attachment of documents in workflow

[Ashish V Barve]

Hello Friends,
 
I am working on  a workflow project where i have a need to attach documents
like invoice copies in the workflow. I know that SAP workflow gives an option
where you can create attachements and link the invoice to the workitem but i
would like to know if any one of you have tried to attach a document in the
transaction which triggers the workflow.
 
e.g in the vendor master data workflow that i am working on needs a invoice to
be attached to the request while triggering the workflow and then this invoice
image is sent along with the workitem to the approval. Today requester can do
this in 2 step process i.e trigger the workflow and create a workitem. Then this
workitem will remain in the requester's inbox  from where he can attach the
invoice.
 
This is a 2 step process while i want to achive this task of triggering the
worklfow and attaching the invoice in 1 single step.
 
Here is the screen shot from where you can create attachement to workitem
 
(Embedded image moved to file: pic04827.pcx)
When you click on button
 
(Embedded image moved to file: pic05436.pcx)On pressing the import button you
can attach the external documents.
 
I would appreciate if you can let me know the functions behind the attachements
which we can do them in one single step.
 
Thanks,
Ashish.