public static extern bool GetComboBoxInfo(IntPtr hwndCombo, ref ShellAPI.COMBOBOXINFO info);
/// <summary>
/// The native window's original handle is released
/// and the handle of the TextBox is assigned to it.
/// </summary>
public ComboEditWindow(BrowserComboBox owner)
{
this.owner = owner;
ShellAPI.COMBOBOXINFO info = new ShellAPI.COMBOBOXINFO();
info.cbSize = Marshal.SizeOf(typeof(ShellAPI.COMBOBOXINFO));
ShellAPI.GetComboBoxInfo(owner.ComboBox.Handle, ref info);
if (!this.Handle.Equals(IntPtr.Zero))
{
this.ReleaseHandle();
}
this.AssignHandle(info.hwndEdit);
}