Handwriting ICR application using Win 7's internal function

We are looking to have an C++ application, which runs under Windows 7. The user can draw a text by using a pen tool in a standalone application, and by pressing a button the software should recognize the text using the Windows 7's handwriting ICR. The normal Windows 7 ICR window shouldn't showed up, it should do it in the background. As it will be a part of an existing project, we will need all the source files. Also for the same reason do not use .NET and/or MFC libraries.