MULTISND.exe is an ActiveX server application that implements sound mixing. The sound mixing algorithm is described in detail under http://www.vttoth.com/CMS/index.php/technical-notes/68.
The CSheetWnd class library implements a spreadsheet-type view of editable data cells. Extra functionality includes the ability to move rows up and down, to mark rows with special attributes, and to use combo boxes when certain cells are edited.
The MultiWnd class library implements multiple subwindow functionality within an MDI child window. An MDI child window derived from CMultiForm (which behaves similarly to CFormView windows) can interact with subwindows derived from CSubForm (which behaves much like CDialog) to provide this multi-level behavior.
