Related to the User Interface changes as described in above topic, the styles of the WebCombo require significant updates as well. If you planned to upgrade your existing web application to use WebCombo.NET 4.0, you should carefully review the breaking changes in the styles aspect as described in the following:
In This Section
How-to: Re-apply the styles to use updated predefined style in designer
How-to: Update the style definition when applying the style programmatically at runtime
Other Resources
User Interface
Default Values