Hello,

You can handle the KeyDownEdit event of the flexgrid and if he is entering multiple lines then can increase the height of the textbox. Here is the code for same:

VB

 Private Sub C1FlexGrid1_KeyDownEdit(sender As Object, e As C1.Win.C1FlexGrid.KeyEditEventArgs) Handles C1FlexGrid1.KeyDownEdit

        If e.KeyCode = Keys.Enter And e.Shift Then
          ' This is to check whether text cursor is on the last line or not
            Dim txtbx As TextBox = C1FlexGrid1.Editor
            If (txtbx.Lines.Length – 1) = txtbx.GetLineFromCharIndex(txtbx.GetFirstCharIndexOfCurrentLine) Then
                C1FlexGrid1.Rows(e.Row).Height += 20
            End If
        End If
     End Sub

C#

private void C1FlexGrid1_KeyDownEdit(object sender, C1.Win.C1FlexGrid.KeyEditEventArgs e)
{
	if (e.KeyCode == Keys.Enter & e.Shift) {
     // This is to check whether text cursor is on the last line or not
		TextBox txtbx = C1FlexGrid1.Editor;
		if ((txtbx.Lines.Length – 1) == txtbx.GetLineFromCharIndex(txtbx.GetFirstCharIndexOfCurrentLine)) {
			C1FlexGrid1.Rows(e.Row).Height += 20;
		}

	}

}

Regards
Ashish