Hi

I am using your code that is used to add an explorer to the outlook. In
addition to adding explorer bar I have also added a menu bar item in my
plugin

I am using the following code to add menu to the outlook (This is in
createMenu function)
CommandBar oCommandBar = IOMCalOutlookExplorer.CommandBars["Menu Bar"];
MSO.CommandBarPopup popup = (MSO.CommandBarPopup)oCommandBar .Controls.Add
(MSO.MsoControlType.msoControlPopup,myMissing,myMissing,myMissing,1);
popup.Caption = "IO&MCal";
popup.Visible = true;
                           
MSO.CommandBar menuCmdBarSync = popup.CommandBar;
MenuSynchronizeButton = (MSO.CommandBarButton) menuCmdBarSync.Controls.Add
(MSO.MsoControlType.msoControlButton,myMissing,myMissing,1,1);
MenuSynchronizeButton.Caption = "&Synchronize";   
MenuSynchronizeButton.Click +=new
MSO._CommandBarButtonEvents_ClickEventHandler(MenuSynchronizeButton_Click);   

In Onclose function I am using the following code to free the objects

MenuSynchronizeButton.Click -=new
MSO._CommandBarButtonEvents_ClickEventHandler(MenuSynchronizeButton_Click);

if(MenuSynchronizeButton != null)
{
    Marshal.ReleaseComObject(MenuSynchronizeButton);
}

if ( IOMCalOutlookCommandBar != null)
{
    IOMCalOutlookCommandBar.Delete ();
    Marshal.ReleaseComObject (IOMCalOutlookCommandBar);   
}

if(IOMCalOutlookMenuCommandBar != null)
{
              IOMCalOutlookMenuCommandBar.Delete ();
         Marshal.ReleaseComObject (IOMCalOutlookMenuCommandBar);   
}       
if (IOMCalOutlookExplorer != null)
{
    Marshal.ReleaseComObject (IOMCalOutlookExplorer);
}

This is working fine in my outlook (outlook 2003)

But in Outlook2002  objects are not releasing properly. A new menubar is
added each time I open the outlook. And also after uninstalling plugin from
the system it is not removed from the outlook.

Regards
Saurabh