Triggering Smartform from VF02/ VF03

Hi,

I have developed a Z-smartform.

I have developed a Z-driver pgm. In this program I have selection screen and passing Invoice No to the program.

Then I am using SSF function module to call the smartform and passing the Invoice no. It is working well.

Instead of Z-driver program 's selection screen, I want to call my smartform directly from VF02 or VF03 (Issue Output)

Plz write code to pass the VF03's invoice number to my z-driver program .

I know the NACE configuratuion and Output types.

Thanks

Narendra