Hi,
Screenshots displaying the issue are attached.
The control in question is set to UseAppStyling = true and UseOsThemes = false
This is running under Windows 7 (but we get similar results under XP.)
In the Windows7Basic.png UltraDateTimeEditor is dropped down. The desktop "personalization" is "Windows 7 Basic.". As you can see, no formatting has been applied.
In the WindowsClassic.png the same control is dropped down. Desktop "personalization" is set to "Windows Classic". The control is formatted by the Year and Month are not visible. They are active, however, so it is likely that this is formatting issue - yellow text on the same yellow background.
Is there a way to format this correctly?
Are you using one of our isl files? Or is this one you created yourself?
Also, what version of the controls are you using?
Does the same thing occur if you go to the Editors canvas in AppStylist and drop down the DateTimeEditor there?