Hi Sahan,
I'm not sure you're going to have a great time trying to read values into LabVIEW from Word using the Report Generation Toolkit.
It appears to be fairly strongly biased towards writing Word documents, generating, etc.
The toolkit is based around the ActiveX reference to the Word application, so you might be able to look inside the RGT VIs and create your own tools to read documents, but I don't know if it will be easy/possible and I'm sure it won't be particularly pleasant.
Why do you need to do this? Perhaps there's another way...