Which is right?

'I wonder what she wrote?'

'I wonder what she wrote.'

I thought it was the former. MS Word says the latter. On consideration, I think it could be either. As part of a narrative, I think it should be the latter:

I sit at the table and look at the letter. I wonder what she wrote. I open the letter.

But if it is dialogue, it should be the former, right?

I pass the letter to my sister. She picks it up.
"I wonder what she wrote?"
"Why don't you open it and see?"

But I want to use it as internal narrative. So I think this would be correct:

She's reading page 9, thinking 'Interesting, an envelope. It must be a note from her sister. I wonder what she wrote?'

What do you think?

I hope someone answers this, because i have the same problem with 'maybe' in internal narratives.

I actually think it isn't, grammatically speaking, a question in either narrative or dialogue, so shouldn't have an ? in either case.

"What did she write?" is a question, but technically "I wonder what she wrote." is a statement, the same as "I think about what she painted", if you see what I mean. I think it's tempting to put a ? on if it's dialogue, because that's how we'd often say it, with a rising, questioning inflection. But grammatically it isn't a question, which you can tell because the word-order isn't inverted as it is with questions; it's an ordinary subject-verb-object statement.

Emma

I remember doing this in school (a long time ago!) and I'm with Emma, I am pretty sure that as "I wonder what she wrote" is a statement no "?" is required

Okay, I'll go with that.

<Added>

It sounds terribly flat in dialogue, though. Like the person saying it doesn't really care, or is being deliberately un-emotional for some reason.

<Added>

without a ? I mean.

I agree with Emma too. It's not a questions.

Simple rule - turn off your grammar checker! Word makes loads of mistakes because it can't undertand context.

If it's in dialogue, though, is it not acceptable to add a ? to convey tone? As we might to a truncated question which isn't grammatical either, e.g. 'You off to work?' or 'Nice for some, eh?'

I think most people would feel that ? is grammar-specific, though. Looking at them, both your examples, Cherys, are grammatically speaking questions, if you reckon that 'You off to work?' is short for 'Are you off to work?', not 'You are off to work.' If so, it has a ? as of right. 'Nice for some, eh?' - hm, I think 'eh?' makes it a question too: doing much the same job as a rhetorical 'isn't it?'.

It's interesting, though... isn't it. Or should that have a '?'?

Emma