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I have a data grid with buttons in the cells (using __EGCS_BUTTON_ELLIPSIS). If I make a cell read-only, the button is disabled. I still need the button to work in these cells. How can I have an enabled button in a read-only cell?

We are not completely sure what result you are expecting to get but if you need a cell without inplace editor, the __EGCS_NO_INPLACE_CONTROL cell style can be more suitable than __EGCS_READ_ONLY.

Read-only cells come with an in-place editor, but it is read-only. In the case of the disabled in-place editor, it is not activated at all

pCell->ModifyStyle( __EGCS_NO_INPLACE_CONTROL );

Thanks for the info. I now have the button enabled, however clicking the button doesn’t work. I’m using CExtGridWnd::OnGridCellButtonPressed to detect and handle the button clicking, but this is not being called because CExtGridCell::OnClick checks if the cell is read-only. I don’t want to override OnClick for every cell type. How do I work around this?

You can control if a cell button is enabled or disabled by overriding CExtGridCell::OnQueryButtonInfo()

virtual bool OnQueryButtonInfo(
    INT nButtonType,
    bool * p_bEnabled,
    bool * p_bPressed = NULL,
    bool * p_bStayPressed = NULL,
    UINT * p_nTimerElapseValue = NULL
    ) const;