Returns content of the blob hex encoded.

A String value.  

object.ToHex

The ToHex Method syntax has these parts:

The ToHex property will return a HEX representation of data currently contained by the Blob. It is most often used because it is easier to represent binary data in this way for transfer by text-only services, such as email.

To get HEX data back into the Blob, you should use the FromHex method.

You can use this method as easily as this:

Dim b As New StreamBlob
Set b.Stream = ref_stream
b.Text = "sometext"
Debug.Print b.ToHex

result:
736f6d6574657874