[Tugindia] Getting Upper Case Letters from a Text String

[Jitender Singh]

Hi TeXies,
I need to process a text string to get upper case letters in it. To be
specific, the newcommand \getUpperCase{Defence Research and Development
Organization, Rajaji Marg Delhi}
shall give DRDO i.e. uppercase letters before comma (,) in the argument
string. Can somebody help me on this?
Regards!
Jitender Singh