The tutorial program virt_fm.c takes the address data form in the tutorial program data_ex.c and makes it a virtual form. The form window is sized so that it is smaller than the virtual form. A similar program, using a Designer form, can be found in dvirt_fm.c.
A virtual form is also used to implement a spreadsheet in the tutorial program spreadsheet.c. A scrollable region is used on a virtual form to create a grid of scrollable fields. This program also demonstrates how to create other virtual forms to use for row and column labels and how to write and install a virtual form scrolling function that scrolls the row and column labels as the user moves in the virtual form. A similar program, using a Designer form, can be found in dspreadsheet.c.
