Trying to see all open word docs. My code displays only two word docs when 4 are open.

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C#

VS2013

when using this code from answer 2: https://www.codeproject.com/Answers/185610/Getting-currently-open-MS-word-insatnce-count-and-.aspx#answer2

Microsoft.Office.Interop.Word.Application objWord;
objWord=(Microsoft.Office.Interop.Word.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Word.Application");
for (int i = 0; i < objWord.Windows.Count; i++)
{
     object a = i+1;
     Window objWin = objWord.Windows.get_Item(ref a);
     MessageBox.Show(objWin.Caption);
}

I do get results displaying two word document windows, but the only problem is 4 exist and 4 word documents are open. It gives me the first 2, but nothing more. Am I doing something wrong?

What I have tried:

I've tried seeing if the count is wrong, but anything outside of 1 and 2 throw an error, even 0. It appears the code doesn't see but two of the docs, even though there are 4. They aren't an old session either. That doesn't matter, since I tested that too. Doesn't matter which two are first, only two are seen.