Align Text in Combobox

This isn't supported for ComboBox. The exact reasons are lost in the fog of time, ComboBox has been around since the early nineties, but surely has something to do with the awkwardness of getting the text in the textbox portion to line up with the text in the dropdown. Custom drawing with DrawItem cannot solve it either, that only affects the appearance of the dropdown items.

As a possible workaround, you could perhaps do something outlandish like padding the item strings with spaces so they look centered. You'll need TextRenderer.MeasureText() to figure out how many spaces to add for each item.

The "border" you are talking about is not a border, it is the focus rectangle. You can't get rid of that either, Windows refuses to let you create a UI that won't show the control with the focus. Users that prefer the keyboard over the mouse care about that. No workaround for that one.

This article will help you: http://blog.michaelgillson.org/2010/05/18/left-right-center-where-do-you-align/

The trick is to set the DrawMode-Property of the ComboBox to OwnerDrawFixed as well as subscribe to its event DrawItem.

Your event should contain the following code:

// Allow Combo Box to center aligned
private void cbxDesign_DrawItem(object sender, DrawItemEventArgs e)
{
  // By using Sender, one method could handle multiple ComboBoxes
  ComboBox cbx = sender as ComboBox;
  if (cbx != null)
  {
    // Always draw the background
    e.DrawBackground();

    // Drawing one of the items?
    if (e.Index >= 0)
    {
      // Set the string alignment.  Choices are Center, Near and Far
      StringFormat sf = new StringFormat();
      sf.LineAlignment = StringAlignment.Center;
      sf.Alignment = StringAlignment.Center;

      // Set the Brush to ComboBox ForeColor to maintain any ComboBox color settings
      // Assumes Brush is solid
      Brush brush = new SolidBrush(cbx.ForeColor);

      // If drawing highlighted selection, change brush
      if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
        brush = SystemBrushes.HighlightText;

      // Draw the string
      e.Graphics.DrawString(cbx.Items[e.Index].ToString(), cbx.Font, brush, e.Bounds, sf);
    }
  }
}

To right align the items you can simply replace StringAlignment.Center with StringAlignment.Far.

Set RightToLeft property to true.
It does NOT reverse the sequence of characters. It only right-justifies.