I have code in datagridview1_paint to draw from one cell to another. (from the cell you clicked last, to 0,0)
If I resize the columns, then it redraws the line, but it leaves old lines in the cells that do not get resized. Also, if I click a new cell, then it draws new lines, but the old ones are still visible. How to I force a refresh of the whole thing? I tried ...graphics.clear(white) and that is not the solution.