The FormatConditions collection can contain up to three conditional formats. Each format is represented by a FormatCondition object.
Use the FormatConditions property to return a FormatConditions object. Use the Add method to create a new conditional format, and use the Modify method to change an existing conditional format.
If you try to create more than three conditional formats for a single range, the Add method fails. If a range has three formats, you can use the Modify method to change one of the formats, or you can use the Delete method to delete a format and then use the Add method to create a new format.
For more information about conditional formats, see the FormatCondition object.