Is it possible to prevent the DataGridView from going out of Edit Mode when a ToolStripComboBox is clicked?

We are inside a WinForm using a ToolStripMenu and a DataGridView.

The DataGridView uses a Custom Cell Editor through the IDataGridViewEditingControl very similar to as described here:

http://msdn.microsoft.com/en-us/library/system.windows.forms.idatagridvieweditingcontrol(v=vs.80).aspx

The problem is this:  We are using the cells in a manor similar to MS Excel where the user can select text in a cell (editor) while it is in Edit Mode and change the font/color of the selected text.The  issue is that the DataGridView's cell goes out of edit mode...and the text selection is lost.

I can determined what text is selected when focus is lost and I can restore edit mode after a font size is selected.  Then I can even restore the selection of text and make the font change.

However, it looks very hokey.  It is preferred that the cell just remain in edit mode if I click ANY item on a ToolStripMenu.

In comparison, if I select a ToolStripButton the cell does not leave edit mode.

So the question is...How can I keep the cell from going out of edit mode when the ToolStripComboBox is clicked?

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Clint