C#

ComboBox1.Items.Add("test");
ComboBox1.SelectedIndex = ComboBox1.Items.Count-1;

int currentIndex = -1;
void OnEnter(object sender, EventArgs e)
{
   currentIndex = comboBox1.SelectedIndex;
}

void KeyDown(object sender, KeyDownEventArgs e)//or whatever the correct event args is
{
   //some code
   case (char)Keys.Enter:
   imageViewer1.RenameShape("test");
   comboBox1.Items[currentIndex] = comboBox1.Text;
   comboBox1.Text = "";
   break;
}

void imageViewer1_Clicked(object sender, EventArgs e)
     {
        // When shape picked select appropriate entry in the combo box
        if (imageViewer1.ListOfShapes.Count > 0)
        {
           for (int i = 0; i < comboBox1.Items.Count; i++)
           {
              if ((string)comboBox1.Items[i] == imageViewer1.ListOfShapes[imageViewer1.SelectedShapeIndex].Name) // imageViewer1.ListOfShapes[imageViewer1.SelectedShapeName].Name)
              {
                 comboBox1.SelectedIndex = i;
                 m_comboBoxCurrentIndex = i;
              }
           }
        }
     }

case (char)Keys.Enter:
               if (comboBox1.SelectedIndex != -1)
               {
                  // Set current selected index and clear text
                  m_comboBoxCurrentIndex = comboBox1.SelectedIndex;
                  comboBox1.Text.Remove(0, comboBox1.Text.Length);
                  
                  // Rename shape in image viewer
                  imageViewer1.RenameShape("test");

                  // Set text for selected item
                  comboBox1.Items[m_comboBoxCurrentIndex] = "test";
                  comboBox1.Text = "";
               }

Shameel wrote:

Have you ever heard of anything called assembly probing ?