try with:
listBox1.Font = New Font("Arial", 10, FontStyle.Regular)
Mitja Bonca
Nearly a Posting Maven
2,485 posts since May 2009
Reputation Points: 641
Solved Threads: 474
If you want to retain the current font but just change the size you can use
listBox1.Font = New System.Drawing.Font(listBox1.Font.Name, fontsize)
And specify your desired value for fontsize.
Reverend Jim
Posting Shark
1,169 posts since Aug 2010
Reputation Points: 253
Solved Threads: 159