What is the underlying Text-Rendering Engine of Internet Explorer?Is it the same as other Windows Apps(GDI)?

I want to know how Internet Explorer(or other Browser such as Chrome and Firefox running on Windows) displays the text content of a HTML. Does it ultimately call the TextOut(hdc,开发者_StackOverflow社区x,y,psText,iLength) Win32 GDI API Function as other windows applications do ?

I failed to draw text with ClearType using GDI.So I wonder whether Internet Explorer using a different Text-Rendering Engine or not.

IE9 uses DirectWrite for its text display; earlier versions used GDI functions.