How do I use a custom .tff font file I have with my current windows.forms application? I read some where that I use it as an embedded resource, but how do I set it the Syst
Use the AddFontResourceEx API function through p/invoke, passing FR_PRIVATE to prevent installing a global font. Then you should be able to pass the font name to the Font constructor as usual.
Edit: If you use the PrivateFontCollection and load the font from an external file, you don't even need this. If you load the font from an embedded resource, use Ash's solution.