For most of my grids (vfp8), I am using the following method:
a) I do a select... into cursor cur_table
b) I fill my grid with
WITH THISFORM.wsgrid1
.Columncount = 8
.RecordSource = "cur_inv"
.Column8.AddObject("wscheckbox1", "wscheckbox")
.Column8.CurrentControl = "wscheckbox1"
.Column1.ControlSource = "cur_inv.invno"
... and so on

It works perfectly when it is just a grid to select or view the records but I have a problem if the grid is used for data input:

a) the valid code is not firing
b) If I put a checkbox there before filling the grid and I don't add a new object, I loose my checkbox

? Is there any way to define the objects within the grid and to not loose them (but still changing my controlsources)
? Is there any way to add code on the interactive change method of the added wscheckbox1 after my addobject command

thanks for any help
Eric