Displaying the same datagridview column headertext with substrings having two different fonts

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C#2.0

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C#

Hi,
I have a datagridview on my form. i am adding columns at runtime with headertext as date and events on that date. The problem is that, i want to show the date and events in different fonts.
e.g. i want to display the headertext as
05/04/2011
Abcd sdfdsfd
dfdsgfdg dgdfg
ddfgf dgffdg

i am getting the headertext string as a whole containing date and events. i have seperated the in two different string, but unable to format and display them in different fonts.

Thanks in advance.