Hi Ranjith
Develop a form e.g. images_frm and its linked with db table app_fd_image_frm, now when you use Form grid on any other form(main_frm) and linked that grid with image_frm, try to consider those points
1- mention image_frm in FORM Option
2- linked your image_frm fields with COLUMN list
3- in DATA Binder select Multirow Form Binder in both LOAD & STORE options
4- in relevant options you select image_frm in FORM and assign Foreign Key in both SOTRE & LOAD
now when you select edit option of any entry in displayed Form Grid rows a popup will appear with image_frm and if you change any option in that form and Submit and then submit the you main form(main_frm) the changes you made in image_frm will be updated in relevant table(app_fd_image_frm).
Regards,