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copied!<p>You could override the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.oncellpainting.aspx" rel="noreferrer">OnCellPainting</a> event to do what you want. Depending on the size of your <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview(VS.85).aspx" rel="noreferrer">DataGridView</a>, you might see flickering, but this should do what you want.</p> <pre><code> class MyDataGridView : DataGridView { private int mMousedOverColumnIndex = int.MinValue; private int mMousedOverRowIndex = int.MinValue; protected override void OnCellMouseEnter(DataGridViewCellEventArgs e) { mMousedOverColumnIndex = e.ColumnIndex; mMousedOverRowIndex = e.RowIndex; base.OnCellMouseEnter(e); base.Refresh(); } protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e) { if (((e.ColumnIndex == mMousedOverColumnIndex) && (e.RowIndex == -1)) || ((e.ColumnIndex == -1) && (e.RowIndex == mMousedOverRowIndex))) { PaintColumnHeader(e, System.Drawing.Color.Red); } base.OnCellPainting(e); } private void PaintColumnHeader(System.Windows.Forms.DataGridViewCellPaintingEventArgs e, System.Drawing.Color color) { LinearGradientBrush backBrush = new LinearGradientBrush(new System.Drawing.Point(0, 0), new System.Drawing.Point(100, 100), color, color); e.Graphics.FillRectangle(backBrush, e.CellBounds); DataGridViewPaintParts parts = (DataGridViewPaintParts.All & ~DataGridViewPaintParts.Background); e.AdvancedBorderStyle.Right = DataGridViewAdvancedCellBorderStyle.None; e.AdvancedBorderStyle.Left = DataGridViewAdvancedCellBorderStyle.None; e.Paint(e.ClipBounds, parts); e.Handled = true; } } </code></pre>

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