Private Sub dataGridView1_CellClick(ByVal sender As Object, ByVal e As
DataGridViewCellEventArgs) Handles DataGridView1.CellClick

Dim cell As DataGridViewImageCell =CType(DataGridView1.Rows(e.RowIndex).Cells(e.Colum nIndex),DataGridViewImageCell)

cell.Value = bmpProva
End Sub