Can you set multiple wxGrid Colum Attributes?

[Bob]

I have a wxGrid with three columns. I want all of the grid
to be ReadOnly. If I do this:

m_LogGrid->ClearGrid();

wxGridCellAttr *ReadOnlyAttr =3D new wxGridCellAttr;// Remove all previous
background colors, and set all of grid ReadOnly
ReadOnlyAttr->SetReadOnly();
m_LogGrid->SetColAttr( LogGridColDate, ReadOnlyAttr );
m_LogGrid->SetColAttr( LogGridColEventInHuman, ReadOnlyAttr );
m_LogGrid->SetColAttr( LogGridColEvent, ReadOnlyAttr );

and do not do this:

wxColour default_cell_background_color =3D
m_LogGrid->GetDefaultCellBackgroundColour();
wxGridCellAttr *ColorAttr =3D new wxGridCellAttr;// Remove all previous
background colors, and set all of grid ReadOnly
ColorAttr->SetBackgroundColour( default_cell_background_color );
m_LogGrid->SetColAttr( LogGridColDate, ColorAttr );
m_LogGrid->SetColAttr( LogGridColEventInHuman, ColorAttr );
m_LogGrid->SetColAttr( LogGridColEvent, ColorAttr );

the gird is ReadOnly as I want, but if I do try to set the background color
of the grid as well, then the grid is no longer read only.

Is it possible to set more than one attribute on a column?

Also the setting of the default background color doesn't seem to work.

If I load my data in to the grid, which colors each cell depending on
the data loaded I get colored cells as I want. However when
I try to return all of the cell backgrounds back to their
default color, when I load new data next time, the old
colors remain. How do I restore the entire grid
to its default background color?

This is with wx287, and Digital Mars Compiler, on Windows XP.
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