AddIn.Installed property (Excel)

True if the add-in is installed or to install the add-in; False if the add-in is uninstalled or to uninstall the add-in. Read/write Boolean.



expression A variable that represents an AddIn object.


Setting this property to True installs the add-in and calls its Auto_Add functions. Setting this property to False removes the add-in and calls its Auto_Remove functions.


This example uses a message box to display the installation status of the Solver add-in.

Set a = AddIns("Solver Add-In") 
If a.Installed = True Then 
 MsgBox "The Solver add-in is installed" 
 MsgBox "The Solver add-in is not installed" 
End If

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