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You can display for the user or hide from the user the filter indicators that appear in the column headers.
Set the AllowAutoFilter property.
Set the ShowFilterIndicator property.
This example enables the filtering on first column and hides the filter indicator.
fpSpread1.Sheets[0].Columns[0].AllowAutoFilter = true;
fpSpread1.Sheets[0].RowFilter.ShowFilterIndicator = false;fpSpread1.Sheets(0).Columns(0).AllowAutoFilter = True
fpSpread1.Sheets(0).RowFilter.ShowFilterIndicator = False