4GL - put_fldbuf() ?

Hi, I need to set up a field inside the INPUT statement. I use DISPLAY in BEFORE INPUT section, but it doesnt work if the length of string is greater than size of screen field. AFAIK there is no function, like get_fldbuf(), that can do it, however, you can see in one of the fgl*.h files the following declaration: extern int fgl_putfldbuf(int); Any ideas how to use this? TIA, RW.