Sorry to keep you waiting. r5907, finally, contains an initial implemenation of drag and drop for the WorksheetGrid. Like in Excel, move the mouse to the border of the thick selection rectangle and drag it to the requested position. During dragging the destination position is highlighted. Holding CTRL down while the mouse button is released creates a copy of the cells, otherwise the source cells are deleted ("Move"). Although only the thick selection rectangle is shown during dragging, the process also takes care of all selected cells even if they are not contained within the highlighted rectangle (multi-select of non-contiguous cells).