>I have some problems with integration from a checkbox into a grid. The SourceControl is a table not a cursor. The table was created at runtime.
>The value of the table must be setting by the checkbox, but the box is readonly and I am not able to change the state of this setting.
>Can anybody help me????

I had this same problem when I added a checkbox to a grid at runtime. I have a picklist form class where, depending on a paramater passed to THISFORM.Init(), the user can select one record or multiple records.

I ended up having to set both of these properties in THISFORM.Init():

THISFORM.grdPickList.COLUMNS[x].chkRecordSelect.READONLY = .F.
THISFORM.grdPickList.COLUMNS[x].chkRecordSelect.VISIBLE = .T.

It took me forever to figure out it was the Visible property that was causing the problem.