如何给合并了的单元格设置背景色呢？

Dim rng As CellRange = c1flexgrid1.GetCellRange(C1FlexGrid2.Rows.Count + 2, 0, C1FlexGrid2.Rows.Count + 2, 4)

默认是灰色，如何更改它的颜色呢

你可以使用Style来设置：

1.         _flex.AllowMerging = AllowMergingEnum.Custom
   
2. 
   
3.         Dim cr As CellRange = _flex.GetCellRange(1, 1, 5, 4)
   
4.         cr.StyleNew.BackColor = Color.AliceBlue
   
5.         cr.StyleNew.Border.Color = Color.Red
   
6.         cr.StyleNew.Border.Width = 2
   
7.         cr.StyleNew.Border.Style = BorderStyleEnum.Dotted
   
8. 
   
9.         _flex.MergedRanges.Add(cr)

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