value_string error message

Hi,

I am trying to write my own dissector and so far it works pretty well. However, I am using value_string but it does not work as expected. By studying other dissectors, I see that most value_string arrays look like the following:

static const value_string foo[] = {
    {1, "One"},
    {2, "Two"},
    {0, NULL} };

Instead of having integers as the value, I want to have characters, example:

static const value_string foo2[] = {
    {'A', "One"},
    {'B', "Two"},
    {0, NULL} };

My header field is the following:

{ &hf_field, /* supposed to be ampersand */
{ "Field", "proto.field", FT_STRING, STR_ASCII, VALS(foo2),0x00, NULL, HFILL }}

The idea behind having FT_STRING is that it should show the char value from foo2. However, this does not work. I get the following error message

"Err Field 'FIELDNAME' has a 'strings' value but is of type FT_STRING (which is not allowed to have strings)"

If I change from "FT_STRING, STR_ASCII" to "FT_UINT8, BASE_DEC" it works but it shows the ascii decimal value (example 65 instead of 'A').

Is there a way I can accomplish this? As previously mentioned, all dissectors I have studied only have integers as their values and not chars. Does that mean my idea is not possible?

I also want to point out that I read this which to me makes it sound like the value_string stuff does not support FT_STRING.