How to convert time in string format into minutes( it can be 12:45 hours or 458:00 hours)

[HUSSAIN]

Hi all, I am trying to convert time in String format into minutes. if
its 12:45hours i can easily do it using substring. but there is a
chance of getting hours for many days like 458:00 hours . please help
me

Thanks in advance

Hussain

[Yagnesh Chawda]

Hey,
Not sure what u want as string result. Can you provide expected
outputs with above two examples so that we can have better idea.

Thanks And Regards,
Yagnesh Chawda.
: http://yagneshchawda.blogspot.com/
: http://twitter.com/yagneshchawda