There are different ways to make it :
if you want to make first letter of a word to Capitalized then you can use Proper.
ex : Proper("umakanta swain") output : Umakanta Swain
if you want to Capitalize only first character of the string/sentence then
ex: mystring = what is your name umakanta ? Left(mystring,1) & Right(mystring, Len(mystring)-1)
output : What is your name umakanta ?