Class: Object

WIN32OLE_EVENT objects controls OLE event.

WIN32OLE_METHOD objects represent OLE method information.

WIN32OLE_PARAM objects represent param information of the OLE method.

WIN32OLE_RECORD objects represents VT_RECORD OLE variant. Win32OLE returns WIN32OLE_RECORD object if the result value of invoking OLE methods.

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

Imports System.Runtime.InteropServices
Public Class ComClass
    Public Structure Book
        <MarshalAs(UnmanagedType.BStr)> _
        Public title As String
        Public cost As Integer
    End Structure
    Public Function getBook() As Book
        Dim book As New Book
        book.title = "The Ruby Book"
        book.cost = 20
        Return book
    End Function
End Class

then, you can retrieve getBook return value from the following Ruby script:

require 'win32ole'
obj = WIN32OLE.new('ComServer.ComClass')
book = obj.getBook
book.class # => WIN32OLE_RECORD
book.title # => "The Ruby Book"
book.cost  # => 20

WIN32OLE_TYPE objects represent OLE type library information.

WIN32OLE_TYPELIB objects represent OLE tyblib information.

WIN32OLE_VARIABLE objects represent OLE variable information.

WIN32OLE_VARIANT objects represents OLE variant.

Win32OLE converts Ruby object into OLE variant automatically when invoking OLE methods. If OLE method requires the argument which is different from the variant by automatic conversion of Win32OLE, you can convert the specified variant type by using WIN32OLE_VARIANT class.

param = WIN32OLE_VARIANT.new(10, WIN32OLE::VARIANT::VT_R4)
oleobj.method(param)

WIN32OLE_VARIANT does not support VT_RECORD variant. Use WIN32OLE_RECORD class instead of WIN32OLE_VARIANT if the VT_RECORD variant is needed.