>I have a form with two columns grid. I set the currentcontrol for column1 to be a checkbox and assign this checkbox to a logic data type for the current table. When I ran my form, and try to toggling(clicking) the checkbox. Nothing happened! and my table remain untouched. Is there something I missed. Thanks in advance.

Under VFP 7.0, I ran into a similar problem with a grid that I programmatically add a check box to if the datatype is logical. While the check box class indicated that its Visible property was .T., when I looked in the debugger, I noted two things. One when I clicked the check box, it went from ReadOnly = .F. to .T.. Further, I noted that the Visible property was set to .F. BTW, Sparse was sent to .F. as well, but that was by design.

I solved the problem by adding a line of code in the method that programmatically added the check box that set the Visible property to .T.