I find a way to do that, after trying something simple !!!

//NEW SHAPE
Ellipse place = new Ellipse();

// SET EVENTS TO CREATED SHAPE
place.MouseLeftButtonDown += shape_MouseLeftButtonDown;
place.MouseMove += shape_MouseMove;
place.MouseLeftButtonUp += shape_MouseLeftButtonUp;

THANK YOU !

private DataGridTemplateColumn AddDataGridComboBoxColumn(XmlNodeList _childnodeList, string header, DataTable table, List data = null)
{
var comboTemplate = new FrameworkElementFactory(typeof(ComboBox));
List items = new List();
for (int count = 0; count < _childnodeList.Count; count++)
{
items.Add(_childnodeList.Item(count).InnerText.ToString());
}
comboTemplate.SetValue(ComboBox.ItemsSourceProperty, items);
comboTemplate.SetValue(ComboBox.SelectedItemProperty, items);
DataGridTemplateColumn column = new DataGridTemplateColumn()
{
Header = header,
CellTemplate = new DataTemplate() { VisualTree = comboTemplate },
CellEditingTemplate = new DataTemplate() { VisualTree = comboTemplate }
};

DataColumn dtcolumn = new DataColumn();
dtcolumn.Caption = header;
dtcolumn.ColumnName = header;
dtcolumn.DataType = typeof(ComboBox);
table.Columns.Add(dtcolumn);
//row[header] = items;
return column;
}

Please let me know what i am missing here. My data row always comes with count 0 without any data.

for (int j1 = 0; j1 < VisualTreeHelper.GetChildrenCount(item); j1++)
{
DependencyObject gridchild_child = VisualTreeHelper.GetChild(item, j1);
DataGrid data = (DataGrid) ((TabItem)gridchild_child).Content;
DataView table = (DataView)data.ItemsSource;

Any will be appreciated…