By gray scaling do you mean antialiasing? Or the gray-bar that InDesign and Illustrator do? (I dunno if MS Office does that too). Or are you wanting it to be antialiased at a smaller point size?

«El futuro es una línea tan fina que apenas nos damos cuenta de pintarla nosotros mismos». (La Luz Oscura, por Javier Guerrero)

Yes, you are right, when I said gray scaling I mean antialiasing or smoothing. Would you please tell me; Is it possible to add information inside font to force it to be always antialiased at a particular defined point size? through hinting or by some other means.

thanks and regards,
Atif

check out the hinting and rasterization.

But this does not answer my question.

"Is it possible to add information inside font to force it to be always antialiased at a particular defined point size?"

Thanks and regards,
Atif

The PPM ranges at which a TrueType font is antialiased are located in the GASP table. In FontLab, you can set the ranges in the Font Info panel under TrueType Settings -> Font Smoothing. Fontographer should have something similar. There's also a Windows command line app called TTFGASP that will add a GASP table to a TrueType font.