Hello abhishek,
RadSpell uses TDF files which are basically text files where every word is defined on a new line along with additional text strings that help the suggestion mechanism of the control to provide you with "sounds-like" suggestions.
e.g.:
grabbed:KRPT:KRPT
grabber:KRPR:KRPR
grabble:KRPL:KRPL
grabens:KRPN:KRPN
gracile:KRSL:KRSL
gracing:KRSN:KRSN
grackle:KRKL:KRKL
gradate:KRTT:KRTT
gradely:KRTL:KRTL
RadSpell comes with dictionary files for English, French and German, and the rest of the available dictionaries are available here: http://www.telerik.com/community/forums/thread/b311D-bethtb.aspx
MS Words dictionaries however are in different proprietary format and RadSpell's dictionary files cannot be converted to it. In general you can put the words from the TDF file in MS Word's custom dictionaries, which are basically text files with every word written on a new line, however these files' capacity is limited.
Sincerely yours,
Georgi Tunev
the Telerik team
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