Application.width <> Userform.width with dual monitors?

I have a userform that is the same width of the excel window which is maximized. I have dual monitors.

Currently the Application.Left is -1445 when excel opens in the left screen, so the screen on the left seems to be in the negative number.

I set userform.left = application.left, and userform.width = application.width, but even though I cannot see the excel window in the right screen, I can see the right tip of my userform in the right screen. I placed some buttons on the right-most of the user form, so the fact that the tip of the userform is peeking into the right screen means my buttons are not perfectly positioned.

If I have a single screen, this is easy to fix, because I know if the application.left is a negative number, then part of Excel is "off screen" and I can adjust the width of the userform by the negative number. However, because the application.left takes into account 2 screens: I can no longer determine how far to shorten the userform.

Does anyone have a solution to this? How do I ensure that no part of the userform is peeking into the right monitor? Thanks!

It doesn't work.

My makeshift solution is to always assume that when using a single screen with a maximized excel window, that the .left will always be a negative number about -5 or less (and never 0 or more). When I was writing the code with a single screen, this always seemed to be the case. Therefore, always reduce the width by an arbitrary 5 points.

Q: has anyone encountered a case where the .left (when Excel is maximized) is not a negative 5 or more? Thanks!