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given an HTREEITEM and a column. How can I do it?

There isn’t an equivalent to CExtGridWnd::GridCellRectsGet in CExtTreeGridWnd that accepts HTREEITEM rather than row.

I need it to invalidate a progress cell rect for repainting in a tree.

Thanks, Dave

You should use CExtGridWnd::GridCellRectsGet() for all grid windows (CExtGridWnd, CExtTreeGridWnd and CExtReportGridWnd). You can convert a HTREEITEM handle into a plain zero-based row index by using CExtTreeGridWnd::ItemGetByVisibleRowIndex(). Please note this method returns a negative value if it failed to compute a row index in a tree row (one of row’s parent items is collapsed).

You should use LONG CExtTreeGridWnd::ItemGetVisibleIndexOf( HTREEITEM hTreeItem) const; method to get the row index from HTREEITEM. If the item is not visible ( its parent is not expanded ), the return value will be -1, otherwise you can use the return value in CExtGridWnd::GridCellRectsGet method.