[futurebasic] increasing/decreasing fontsize by one point in a styled edit field

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From: Bowerbird@...
Date: Fri, 18 Jun 1999 14:50:38 EDT
sorry, i wasn't clear enough.

i need to do the font-size changes within futurebasic,
programatically, not in resedit or resourcer.

and it needs to be for a styled edit field, where this code 
simply returns a -1 for the size (to indicate the field is styled):
>   editFieldHandle& = TEHANDLE(efNum)
>   mySize% = editFieldHandle&..teSize%

finally, i needs to apply this only to the user-specified
selected text, not to all the text in the field.

so i'm still lookin'...