Boost Format

I was wondering if anyone knows the proper syntax for padding with 0s using Boost.Format. I am trying to get HH:MM:SS, and I have the following:

Code:

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typedef boost::basic_format<TCHAR> tformat;
tformat(_T("%1%:%2%:%3%")) % Data.EtaHours % Data.EtaMinutes % Data.EtaSeconds));

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This will give H:M:S, though.
Any ideas? The boost documentation can be so bad at times.

How about this from boost?

Code:

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%{nt} , where n is a positive number, inserts an absolute tabulation. It means that format will, if needed, fill the string with characters, until the length of the string created so far reaches n characters

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Why not use Boost::DateTime?

Hmmm. Good question. It might be able to work. I could at least try.