free software + creates new characters +assign unicodes so that I can use with ms excel,word etc

Hi,

I need a help,I need a free software which creates new characters and assign unicodes so that I can use with ms excel,word etc.

I know the application windows private character editor,it does what I need to do,but drawing smooth curves is bit difficult.

I would like to download a free software for windows 7 which draws smooth curves as well as other symbols with unicode and I want to use the unicodes to display the character.

Please help me.

Thanks,
Noornisha

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