Conversion from type Byte() (array) to 'String' is not valid.
aka. one of the parameters is wrong.
^^If it works for strings, but not "binary data", maybe check the 3rd parameter. I don't think it's supposed to be ""
for the 3rd parameter, type in RegistryValueOptions. (see the period) for available values.
OR, the value being returned can't be assigned to a text box.