Hi Mark,
Thanks for your interest in Syncfusion Products.
Your requirement can be achieved by using the following codes snippet,
this.currencyTextBox1.RemoveDecimalZeros = true;
I have included the sample as per your requirements as follows,
http://www.syncfusion.com/downloads/Support/DirectTrac/87072/CurrencyTextBoxSample-14195169.zipPlease have a look on the above sample and let us know if you need further assistance.
We are glad to help you out.
Regards,
Arun A.