The illustrated element in the screenshot is GridRowHeaderCellElement
. I would like to recommend you using the RadControlSpyForm
which is a very useful tool for inspecting different elements in any control from the Telerik UI for WinForms suite. If you need to customize the grid cells you can use the ViewCellFormatting
event and apply the desired style. Additional information for formatting the cells is available in the following help article: https://docs.telerik.com/devtools/winforms/gridview/cells/formatting-cells
I hope this information helps. If you have any additional questions, please let me know.