ole_instance_variable_set

Sets value specified by the member name of VT_RECORD OLE object. If the member name is not correct, KeyError exception is raised. If you can’t set value of member of VT_RECORD OLE object directly, use this method.

If COM server in VB.NET ComServer project is the following:

Imports System.Runtime.InteropServices
Public Class ComClass
    <MarshalAs(UnmanagedType.BStr)> _
    Public title As String
    Public cost As Integer
End Class

then setting value of the `title’ member is as following:

srver = WIN32OLE.new('ComServer.ComClass')
obj = WIN32OLE_RECORD.new('Book', server)
obj.ole_instance_variable_set(:title, "The Ruby Book")