>I think you are right. The EditBox control is in a grid. When I set the ReadOnly on the Column it works fine, but on the individual control it does not. Thanks.

This is a VFP bug.

When you go into a grid cell, VFP copy the Column.ReadOnly value into
the CurrentControl.ReadOnly.
This can to be correct when Column.Bound = .T.,
but when Column.Bound = .F. VFP have not to make this assign.

This operation it is done into the events sequence:
-CURRENTCONTROL.GOTFOCUS
- < HERE >
- GRID PAINT
- GRID.AFTERROWCOLCHANGE

then you can reset it into the AFTERROWCOLCHANGE only.

Fabio