Seattle (WA) - Microsoft Corp. said Wednesday it will buy a small Chicago-based technology company and add its group-chat software to a broad vision for integrated office communications programs.

Microsoft and Parlano did not disclose financial details of the deal but said they expect it to close in October. Executives for the two companies said they do not yet know if any of Parlano’s staff will be laid off, or if the company will relocate to Redmond, Wash., where Microsoft is based.

Parlano, a seven-year-old company with 50 employees, makes the MindAlign group chat program, which lets users log on to a permanent chat room and send messages in real time, or search through an archive of the conversation later.