ComboBox, ListBox, or CheckedListBox Control

• ' Visual Basic
  ComboBox1.Items.Add("Tokyo")
  
  // C#
  comboBox1.Items.Add("Tokyo");
  
  // C++
  comboBox1->Items->Add(S"Tokyo");
  

  - or -
• Insert the string or object at the desired point in the list with the Insert method:
  ' Visual Basic
  CheckedListBox1.Items.Insert(0, "Copenhagen")
  
  // C#
  checkedListBox1.Items.Insert(0, "Copenhagen");
  
  // C++
  checkedListBox1->Items->Insert(0, S"Copenhagen");
  

  - or -
• Assign an entire array to the Items collection:
  ' Visual Basic
  Dim ItemObject(9) As System.Object
  Dim i As Integer
     For i = 0 To 9
     ItemObject(i) = "Item" & i
  Next i
  ListBox1.Items.AddRange(ItemObject)
  
  // C#
  System.Object[] ItemObject = new System.Object[10];
  for (int i = 0; i <= 9; i++)
  {
     ItemObject[i] = "Item" + i;
  }
  listBox1.Items.AddRange(ItemObject);
  
  // C++
  System::Object* ItemObject[] = new System::Object*[10];
  for (int i = 0; i <= 9; i++)
  {
     ItemObject[i] = String::Concat(S"Item", i.ToString());
  }
  listBox1->Items->AddRange(ItemObject);
  

To remove an item

• Call the Remove or RemoveAt method to delete items.
  Remove has one argument that specifies the item to remove. RemoveAt removes the item with the specified index number.
  ' Visual Basic
  ' To remove item with index 0:
  ComboBox1.Items.RemoveAt(0)
  ' To remove currently selected item:
  ComboBox1.Items.Remove(ComboBox1.SelectedItem)
  ' To remove "Tokyo" item:
  ComboBox1.Items.Remove("Tokyo")
  
  // C#
  // To remove item with index 0:
  comboBox1.Items.RemoveAt(0);
  // To remove currently selected item:
  comboBox1.Items.Remove(comboBox1.SelectedItem);
  // To remove "Tokyo" item:
  comboBox1.Items.Remove("Tokyo");
  
  // C++
  // To remove item with index 0:
  comboBox1->Items->RemoveAt(0);
  // To remove currently selected item:
  comboBox1->Items->Remove(comboBox1->SelectedItem);
  // To remove "Tokyo" item:
  comboBox1->Items->Remove(S"Tokyo");
  

To remove all items

• Call the Clear method to remove all items from the collection:
  ' Visual Basic
  ListBox1.Items.Clear()
  
  // C#
  listBox1.Items.Clear();
  
  // C++
  listBox1->Items->Clear();