If I have hidden rows in my grid, the Merge Cells does not merge data when there is a hidden row between two rows which have matching cell data. How can I tell the grid that it merges rows even if there are hidden rows in between?

OG sees hidden cells more like regular cells (but just temporarily not visible).

An idea to get around this behavior would be to override GetStyleRowCol and check whether the row is hidden or not. If it is hidden, simply call the base class version with CGXGridCore::GetStyleRowCol(nRow-1, nCol, …);

This way the value of the hidden row would be the same as the previous row (and then the cells would be joined together).