Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.ClickДЇor intcount = 0 To - 1 Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.LoadДim installed_fonts As New InstalledFontCollectionДЇor Each font_family As FontFamily In installed_fonts.Families The form load shows that Monotype Corsiva is in the font library and the try picks up the error more elegantly. I use designer (or could use code) to change the default font for the Richtextbox and either type some text into the box or copy and paste from wordВ a small text line which changes fonts and colours and then press button. Test program has a richtextbox (richtextbox1)В and a listbox (lstFont)В defined with a button (button2)В to start the test.

I'm sorry this was just a small extract used with debug with breakpoints to show that the selection font went to nothing when font was switched to corsiva. I have seen posts that show this font does not have a 'regular' style but is there a way round this, presumably other fonts could exist that cause the same problem. If I set the default font for the box to be monotype corsiva this starts fine, picks up font changes to sayВ Arial but errors when reverting later back to monotype. The new colour and backcolour have been updated correctly but the box.selectionfont is nothing. This works fine until i reach a change of font to monotype corsiva which errors as Null Reference exception was caught. This is based on several published suggested methods and covers change of colour, backcolour and font. I have a small test program that iterates character by character to read through the contents of a richtextbox and convert to html to include in an e-mail.

Script monotype corsiva