Different form width on W7 vs W10?

I've written a VB.NET desktop application.

The main form appears wider on a W7 machine than W10.

How can I fix this?  Using a tape measure I see that the W7 machine displays the form about 1" wider.
Sheldon LivingstonConsultantAsked:
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David Johnson, CD, MVPRetiredCommented:
same monitor and same video card, and same display properties? Is it winforms or wpf project?
Sheldon LivingstonConsultantAuthor Commented:
Um no... not same monitor, same video card and same display properties.  That'd be pretty amazing.

winforms
Sheldon LivingstonConsultantAuthor Commented:
We found a work around to make our application look close enough across different OS's.

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