Excel Add-In Context Menu Buttons - vba

Question

I have an Excel Add-In that I have created ( .xlam file ) I am trying to have this add-in create buttons on the right click menu so that I can quickly run a macro based on the selected cell. I added code to ThisWorkbook, and it works in the xlsm file. (I copied the code from HERE.) I SaveAs to an xlam, load the add-in, and I get nothing on the context menu. I have a feeling these subs do not load through the add-in. However, I can get code in Workbook_Open to function. Can someone point me in the right direction?
Private Sub Workbook_Deactivate()
On Error Resume Next
With Application
.CommandBars("Cell").Controls("Open Drawing").Delete
End With
On Error GoTo 0
End Sub
Private Sub Workbook_SheetBeforeRightClick(ByVal Sh As Object, ByVal Target As Range, Cancel As Boolean)
Dim cmdBtn As CommandBarButton
On Error Resume Next
With Application
.CommandBars("Cell").Controls("Open Drawing").Delete
Set cmdBtn = .CommandBars("Cell").Controls.Add(Temporary:=True)
End With
With cmdBtn
.Caption = "Open Drawing"
.Style = msoButtonCaption
.OnAction = "Open_Drawing_Main"
End With
On Error GoTo 0
End Sub

Answer 1

You have to use AddinInstall event. I assume that your context menu procedure works fine. So double click on ThisWorkbook in the add-in file (before you install it and save it as xlam), select AddinInstall event from the upper write dropdown menu and place some code like this:
Private Sub Workbook_AddinInstall()
Call AddToRightClickMenuOptions_Main
End Sub
in this code AddToRightClickMenuOptions_Main is the sub that creates the context menu. Note that you may want to remove the context menu when you uninstall the add-in:
Private Sub Workbook_AddinUninstall()
Call DeleteFromRightClickMenuOptions_Main
End Sub
where DeleteFromRightClickMenuOptions_Main is the routine that removes the context menu (you can find the code easily on the internet)

Answer 2

An Excel Add-in (at least, the ones I have created) still have their own workbook. The Workbook_SheetBeforeRightClick and Workbook_Deactivate will run when the .xlam's workbook is either right-clicked or deactivated. If you want the code to run only for when the selected workbook is right-clicked or deactivated, you'll have to have the code in that specific workbook's code.
However
Since you are trying to get this to work with an add-in, I'm going to go through a few relevant points since once an Add-in is loaded, it (and it's features) are accessible from all other open workbooks.
If the option is added to the context menu whenever a page is right-clicked in any book (which it would (as coded, if it worked)), removing the context menu option when any workbook is deactivated won't have any visible effect, as the next time a right-click happens the option will once again be visible.
Is there a reason why the context menu can't just be added when the add-in is opened (add-in's Workbook_Open), and removed when it's closed(add-in's Workbook_BeforeClose)? (As this will visibly have the same effect as the above code.)