Adding my smartform output to a standrd screen
In VF01 there will be a print preview button.Whenu click that it will show the standard print program.I need to put my smartform output in that print preview button instaed of standard print program display.
If not tell me how to add a new button and can cal the smartform designed by me
You need to configure a new output type and associate it with your program / smartform. See transaction NACE.