When you click the DBGrid title cell with the mouse, a black vertical line always appears on the left side of the column, and the vertical line disappears after the mouse is clicked. How can I avoid this vertical line when I click it?

When you click the DBGrid title cell with the mouse, a black vertical line always appears on the left side of the column, and the vertical line disappears after the mouse is clicked. How can I avoid this vertical line when I click it? Delphi/Windows SDK/API
Http://www.delphi2007.net/DelphiDB/html/delphi_20061216114502274.html
RT

Never met

Well, you may need to write down DBGrid again.
However, DBGrid is not used now.

Set dgcolumnresize to false in the options attribute of DBGrid.

The standard name of the black line is the effect line.