When you post the same question over and over people will just tend to ignore you. You have asked the question several times and the answer has been posted in several forms.
Below I will post a complete class that will change the Title Bar. The class below is as simple as it gets and if you are unable to get it to work then you will need to think about taking some basic .NET courses and/or read up on the .NET API for AutoCAD. I would suggest going through the Autodesk training located at
http://usa.autodesk.com/adsk/servlet/index?id=18162650&siteID=123112. If you had already done the miminum and looked at this course then you would not be asking the questions that you are asking.
// Requires reference to accoremgd.dll, acdbmgd.dll, & acmgd.dll
using Autodesk.AutoCAD.Runtime;
using AcApp = Autodesk.AutoCAD.ApplicationServices.Application;
[assembly
: CommandClass
(typeof(TheSwamp
.Mep.TitleBar))] [assembly
: ExtensionApplication
(typeof(TheSwamp
.Mep.TitleBar))]
namespace TheSwamp.Mep
{
class TitleBar : IExtensionApplication
{
private const string TitleBarText = "Manually modified TitleBar Text";
// Will change the text of the main window upon loading of the plugin.
public void Initialize()
{
AcApp.MainWindow.Text = "AutoCAD MEP 2014 - Brought to you by The Swamp.org";
}
public void Terminate()
{
}
// Will change the text of the main window when the command is ran.
[CommandMethod("ModifyTitleBar")]
static public void ModifyTitleBar()
{
AcApp.MainWindow.Text = TitleBarText;
}
}
}
**Edit** To include comments as to what each method does.