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Hello all,

How can I limit the columns sorting functionality to the N first lines of my grid?

Typically, I want to add 20 rows on my grid. Only the 15 first rows will be sortable, the 5 final rows are for calcul and statistics (with no sorts).

Thanks for your help.

Here is a solution. Create a CExtGridDataProviderMemory-derived class and override the CExtGridDataProviderMemory::SortOrderUpdate() virtual method in it. Your method should be similar to the original version except it should invoke the CExtGridDataProviderMemory::_SortStep() internal method and specify the nLow and nHigh parameters as the row range you want to see sorted. Both nLow and nHigh values are computed as zero-based data row numbers plus the total number of header rows at the top and at the bottom. These rows are stored at the top of a two dimensional cell array of the memory data provider. You will also need to use your own CExtGridWnd-derived class and override the CExtGridWnd::OnGridQueryDataProvider() virtual method which should return a reference to your memory data provider instance.