If you are looking to make the Grid read only or not allow editing for a specific user you could look at the following:
- Disable a Band or the Entire WinGrid in the Editing Data section of the help.
- Changing the CellClickAction to CellSelect or RowSelect rather than Edit or EditAndSelectText.
If you wish to prevent editing conditionally for certain cells, the BeforeEnterEditMode event can be canceled.