You can either use the virtual keyboard above to type your letter or your own keyboard! If you use your keyboard, make sure you click inside the message area first so that the cursor will apear.
The virtual keyboard featured up was developed by a Thai student called Puttipan Polnyanunt. He is currently studying in the USA. You can use his virtual keyboard to type Thai even if you don't have Thai fonts! You can then copy and paste them into any document on your computer.