[cairo] When to use cairo_win32_surface_create

[Andrew S Katz (tb)]

I am new to cairo. My goal is to use it in a Microsoft Windows 
application which shows curved shapes I generate using mathematical 
formulas. When do I use cairo_win32_surface_create and when do I use 
cairo_image_surface_create? And are there any rules on how to set up or 
not to set up a Window to show the graphics?