vb.net time format string.

Codes	Output
Format(Now, "h")	System.FormatException was unhandled Input string was not in a correct format.
FormatDateTime(Now, DateFormat.ShortTime)	19:36 (in 24 hour)
DateTime.Now.ToString("h") or Now.ToString(" h")	7 (in 12 hour)
Now.Hour.ToString(" h")	h (not appear figure in hour)

reference of string formating:
• http://msconline.maconstate.edu/tutorials/VBNET/VBNET01/vbnet01-08.aspx
• http://www.stevex.org/CS/blogs/dottext/articles/158.aspx