Can I mix GDI and GDI+ drawing in my application?
You can mix GDI and GDI+ drawing operations in the same code path. The article INFO: Interoperability Between GDI and GDI+ (Q311221)
discusses some caveats to keep in mind when you are writing code that allows GDI and GDI+ to interoperate.
See also the FAQ "How to create my own hatch styles for brushes" for an example how to use GDI bitmaps with GDI+.
The most prominent functions for mixing GDI and GDI+ are the GetHdc and ReleaseHdc methods of the Graphics class.