MsgBox Text Display Problem: display text is truncated

I have a function that is passed a string. The function takes the string and copies it to the Clipboard and then displays the text in a MsgBox. The text is too long and is getting truncated.

Here is the MsgBox instruction:

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Question 1: What is the maximum string size that can be displayed by MsgBox?
Question 2: Is there a simple solution to enable display of the entire string? (note: "simple" because I am not an expert)

Thanks, much.
Regards,
Sue

Kaper,
Thanks for your response and example. Using your suggestion, I was able to display the full text. One curiosity, though. I ran with debug to double check the length of the text and it's only 998. Weird. But I just put a test in for length of 900 and if less than or equal to 900 use MsgBox else use Windows Script. Fantastic. Thanks, again.
Sue