public event RowHeightChangedEventHandler RowHeightChanged

Public Event RowHeightChanged As RowHeightChangedEventHandler

public Form1()
{
    InitializeComponent();
    IWorkbook workbook = spreadsheetControl.Document;
    Worksheet worksheet = workbook.Worksheets.ActiveWorksheet;

    // Add a picture to cell B2.
    Cell destCell = worksheet.Cells["B2"];
    Picture picture = worksheet.Pictures.AddPicture("DxLogo.png", destCell);
    // Specify the cell width and height.
    double cellWidth = destCell.ColumnWidth = picture.Width + 150;
    double cellHeight = destCell.RowHeight = picture.Height + 50;

    // Center the picture in the cell.
    double columnOffset = (destCell.ColumnWidth - picture.Width) / 2;
    double rowOffset = (destCell.RowHeight - picture.Height) / 2;
    picture.Move((float)rowOffset, (float)columnOffset);

    spreadsheetControl.ColumnWidthChanged += (s, e) =>
    {
        if (e.Index == destCell.ColumnIndex)
        {
            // Move the picture to keep it in the center of the cell.
            columnOffset = (destCell.ColumnWidth - cellWidth) / 2;
            picture.Left += (float)columnOffset;
            cellWidth = destCell.ColumnWidth;
        }
    };

    spreadsheetControl.RowHeightChanged += (s, e) =>
    {
        if (e.Index == destCell.RowIndex)
        {
            // Move the picture to keep it in the center of the cell.
            rowOffset = (destCell.RowHeight - cellHeight) / 2;
            picture.Top += (float)rowOffset;
            cellHeight = destCell.RowHeight;
        }
    };
}

Public Class Form1
  Public Sub New()
      InitializeComponent()
      Dim workbook As IWorkbook = spreadsheetControl.Document
      Dim worksheet As Worksheet = workbook.Worksheets.ActiveWorksheet

      ' Add a picture to cell B2.
      Dim destCell As Cell = worksheet.Cells("B2")
      Dim picture As Picture = worksheet.Pictures.AddPicture("DxLogo.png", destCell)
      ' Specify the cell width and height.
      destCell.ColumnWidth = picture.Width + 150
      Dim cellWidth As Double = destCell.ColumnWidth
      destCell.RowHeight = picture.Height + 50
      Dim cellHeight As Double = destCell.RowHeight

      ' Center the picture in the cell.
      Dim columnOffset As Double = (destCell.ColumnWidth - picture.Width) / 2
      Dim rowOffset As Double = (destCell.RowHeight - picture.Height) / 2
      picture.Move(CSng(rowOffset), CSng(columnOffset))

      AddHandler spreadsheetControl.ColumnWidthChanged,
          Sub(s, e)
              If e.Index = destCell.ColumnIndex Then
                  ' Move the picture to keep it in the center of the cell.
                  columnOffset = (destCell.ColumnWidth - cellWidth) / 2
                  picture.Left += CSng(columnOffset)
                  cellWidth = destCell.ColumnWidth
              End If
          End Sub

      AddHandler spreadsheetControl.RowHeightChanged,
          Sub(s, e)
              If e.Index = destCell.RowIndex Then
                  ' Move the picture to keep it in the center of the cell.
                  rowOffset = (destCell.RowHeight - cellHeight) / 2
                  picture.Top += CSng(rowOffset)
                  cellHeight = destCell.RowHeight
              End If
            End Sub
  End Sub
End Class