Limitations with Variant Controls (Windows CE, Touch Panel Module)
Variant controls are supported but are not visible in the application running on the target.
Variant data does not conform to a specific data type and can contain attributes. LabVIEW represents variant data with the variant data type.
You cannot initialize variant data with default data in a VI. Placing a control, indicator, or constant that contains default data on the block diagram of the VI results in an empty LabVIEW variant.