Library/Framework for a "Mathematical Equation Editor" application

["Bernhard Keil" <Bernhard_Keil gmx net>]

Hello,
I am searching for a library or framework wich
fullfills the special requirements for the implementation
of a mathematical equation editor
application (like "MathType" e.g. http://www.dessci.com/features/basic.stm).


I have the following questions:

1.) Does GTK fullfill the needs?
2.) Is there a GTK implementation for
    -Windows2000
    -MS Visual Studio 6.0
3.) Are there other frameworks wich would
    fullfill my needs better?


Thanks

Bernhard