datagrid event

[Liszt]

I try to get the events working in the datagrid for this.

With this code I change BackColor from black to MediumSeaGreen.

dataGridView1->Rows[3]->Cells[10]->Style->BackColor = Color::MediumSeaGreen;

When the BackColor is changed, should´t this messagebox appear ?
It doesn´t. I have also tried the event BackgroundColorChanged.

private: System::Void dataGridView1_CellStyleChanged(System::Object^  sender, System::Windows::Forms::DataGridViewCellEventArgs^  e) 
{
	 MessageBox::Show("BackGroundColor is changed");
}