Hello, Claude,
I have prepared a sample code snippet demonstrating how to show screen tips for the cells in
RadGridView. The text for a label element in
RadStatusStrip is also updated:
public RadForm1()
{
InitializeComponent();
this.radGridView1.ScreenTipNeeded += radGridView1_ScreenTipNeeded;
}
RadOffice2007ScreenTipElement screenTip = new RadOffice2007ScreenTipElement();
private void radGridView1_ScreenTipNeeded(object sender, ScreenTipNeededEventArgs e)
{
GridDataCellElement cell = e.Item as GridDataCellElement;
e.Delay = 1;
if (cell != null && cell.ColumnIndex == 1)
{
this.radLabelElement1.Text = cell.Text;
screenTip.CaptionVisible = false;
screenTip.MainTextLabel.Text = cell.Text.ToString();
cell.ScreenTip = screenTip;
}
}

Additional information for screen tips is available here: https://docs.telerik.com/devtools/winforms/telerik-presentation-framework/tooltips-and-screentips/screen-tips
An alternative approach is to use tool tips for the grid cells: https://docs.telerik.com/devtools/winforms/controls/gridview/cells/tooltips
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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