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I would like to delete one row from the grid when I type the delete key. I know the way to remove one row, I know the way to capture the delete key by means the OnGbwAnalyzeCellKeyEvent(..) method, but I don’t know from the inside of such a method how to retrieve the current selected row.
I would appreciate if you could help me.

The selection model in CExtGridWnd uses an array of CRect objects with each rectangle describing a range of selected columns and rows. This model is used even in full row selection grids. There is a set of CExtGridBaseWnd::Selection***() methods that allow you to do everything with selection. Typically you should use the CExtGridBaseWnd::SelectionGetFirstRowInColumn()/CExtGridBaseWnd::SelectionGetNextRowInColumn() methods to traverse all selected rows in the grid window. If you are using a single row/cell selection model, you should use CExtGridBaseWnd::FocusGet() instead because focus and selection is the same in this case.