Inventory system for RPG-type game in Visual Basic

create an items class, having the contstructor include, type, damage, etc.. all your properties.
then you can populate an 'ArrayList' with different instances of the class.
i.e.:

Public Class Item

    Private itemName As String
    Private Const itemStrength as int = 100
    
    Property Line() As String
        Get
           Return itemName
        End Get
        Set(ByVal Value As String)
            mstrLine = Value
        End Set
    End Property
     
    ReadOnly Property strength() As Integer
       Get
           Return itemStrength
       End Get
    End Property
End Class

then populating the arraylist would be like:

inherits System.Collections;

...


 dim ar as new Arraylist()
 dim Itm as new Item()
 itm.Type = "Armor"
 itm.Damage = itm.itemStrength
 ar.Add(itm);

and so on so then you'l have an arraylist which will hold all your items. google Arraylist for more