1. A computer-implemented method for enabling a host application to retrieve document images of a plurality of physical documents stored in a document management system through an enabler application that is used for creating an association between at least one field on an interface of the host application and at least one field of the document management system, the method comprising steps of: (a) executing the enabler application and the host application by an execution application; (b) displaying the interface of the host application while the host application is executing during run-time, wherein the interface of the host application contains the at least one field; and (c) while the interface is being displayed, creating an association using the enabler application between the at least one field on the interface of the host application and the at least one field of the document management system that is used for retrieving the document images from the document management system, wherein the association identifies the at least one field on the interface based upon a position of the at least one field on the interface, (d) in response to receiving an indication at the enabler application that the at least one field on the interface is an interactive field, when a user performs an interaction with the interactive field, a query is immediately performed based on existing data in the interactive field, and any document images retrieved from the document management system are displayed based on the performed interaction; wherein data provided for the at least one field on the interface of the host application during the execution of the host application is captured based upon the position of the at least one field on the interface, and wherein the data captured from the at least one field is used to generate bar codes based upon the created association; the generated bar codes are associated with one or more physical documents for automating input of the one or more physical documents into the document management system; the bar codes are generated before the one or more physical documents exist; an indexing process is performed from the executing application, wherein the indexing process assigns an index record including keyword values to corresponding physical documents from the data provided to the interface, during the indexing process, the user matches data currently displayed on the interface of the host application with a particular physical document to be indexed in the document management system to eliminate needs to re-key index information of the particular physical document in the document management system; and the index record is associated with the plurality of physical documents.
3. The method of claim 1 , wherein the at least one field on the interface is identified through a unique window identifier that is assigned to control appearing on the interface, wherein identification of the at least one field on the interface is used to determine whether the data provided to the at least one field is to be used in generating the query for retrieving the document images from the document management system.