CommandBars.FindControl throwing an exception - ms-word

Question

I am trying to use the FindControl Method of the CommandBars object in a VSTO Word addin to get what else a command bar object
Code is as follows
private void WireContextMenu(string MenuID,string Tag, string ID, ref Office.CommandBarButton Control)
{
try
{
object missing = System.Type.Missing;
Control = (Office.CommandBarButton)this.Application.CommandBars[MenuID].FindControl((object)Office.MsoControlType.msoControlButton, ID, Tag, missing, missing);
if (Control == null)
{
Control = (Office.CommandBarButton)this.Application.CommandBars[MenuID].Controls.Add(Office.MsoControlType.msoControlButton, ID, missing, missing, missing);
Control.Caption = "Biolit Markup Selection";
Control.Tag = Tag;
}
Control.Click += new Microsoft.Office.Core._CommandBarButtonEvents_ClickEventHandler(this.cb_Click);
}
catch (Exception Ex)
{
}
}
The FindControl method is throwing a Type Mismatch Exception (-2147352571)
Any ideas
is this the right way anyhow to add a item to the right click menu of word and then make sure you dont add it if it already exists
Thanks

Answer 1

you are using Missing where Missing is not allowed as parameter
ref: link text
http://msdn.microsoft.com/en-us/library/system.type.missing.aspx
use code like this:
object type = MsoControlType.msoControlPopup;
object id = 1;
object tag = null;
object visible = 1;
object recusive = false;
//object missing = System.Type.Missing;
CommandBarControl barControl = popParent.FindControl(type, id, tag, visible, recusive);