Standard Program enhancement

Hi Experts,

I have a requirement where in i need to grey out a seelction screen field.

its a standard program, the first selection screen has few push buttons, the click on a push button calls a another selection screen, i need to grey out a field in second selection screen.

module pool programming is not used, submit is used to call the another program.

kindly guide me on this.

thanks in advance.

regards,

Kushala