Add text to header/footer of Office/OpenOffice format using Office and OpenOffice object model

Module to add given text either in header or footer of Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX) and OpenOffice (ODT, ODS, ODP) file. This needs to be achieved using Office and OpenOffice APIs which is installed on the machine. Ideally, it should be developed in C/C++ (Win32 DLL or COM). If it is developed in .NET, it should be designed such way that it can be called from C/C++ and delivery should include Win32 DLL which uses .NET module internally to add text in header. Delivery includes sample code explaining how to use the module. Where should text get added? - DOC/DOCX/ODT: Text should get added in header or footer, either in left, right or center. Text can be seen in normal view. - XLS/XLSX/ODS: Text should get added in header or footer, either in left, right or center. Text can be seen in Page view. - PPT/ODP: Text should get added in footer, center of the slide. Text can be seen in normal view and slide show. - Module should have following options: File path, text to be added, where to add text (header or footer), alignment (left, right or center). It should behave as per above exceptions for diff. format. - Sample file are attached. - All payment expect initial will be released after I test and approve the delivery. I will need max. week to test and approve the delivery.