Please try to use the designer tools available in Expression Blend in order to customize the Add Event button in UXScheduleView control.

1. Open the UXScheduleView project in Expression Blend.
2. Open UXScheduleView xaml page in design view of Expression Blend.
3. Edit the UXScheduleView template by right-click on the UXScheduleView, click Edit Template, click Edit a Copy.
   
   
4. Select the UXToolGroup under UXToolBar within the Object and Timeline panel.
   
   
5. In the following sample, the Content is set to “Add New”; and the Width is set to 64.
   
   

Hope this helps.

Hi  Yudi,

Thank you for your reply,I can do it successful do as you said above, thank you Very much!

Glad to hear that editing the template in Blend helps.

Should you need further assistance or run into any problems regarding our controls, feel free to post it into our forum. We would be happy to assist you again.