//Add data
for (var col = 1; col < 6; col++)
{
for (var row = 2; row < 11; row++)
{
GcSpreadSheet1.Sheets[0].SetValue(row, col, row + col);
}
}
GcSpreadSheet1.CanUserUndo = true;
GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ColumnResizeExtent[] columns;
columns = new GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ColumnResizeExtent[] {new GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ColumnResizeExtent(2, 4)};
var action = new GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ColumnResizeUndoAction(GcSpreadSheet1.Sheets[0], columns, 100, false);
GcSpreadSheet1.DoCommand(action);