Certain programs (Directory Opus, Everything Search, and more) don't completely fill zones near monitor edges

[conradsrc]

Microsoft PowerToys version

0.76.2

Installation method

WinGet

Running as admin

Yes

Area(s) with issue?

FancyZones

Steps to reproduce

1. Create a zone layout with without "spaces around zones" (I'm actually using -2px on these screenshot'd layouts but the behavior is identical with this setting turned off completely).
2. Snap certain programs (listed below) to one of these zones.

PowerToysReport_2024-01-06-16-14-03.zip

✔️ Expected Behavior

Window expands to fully fill the zone in the same way that the vast majority of programs do.

❌ Actual Behavior

Window has an ~8 pixel gap on 1-2 sides. As you can see from the screenshot, the ones on my bottom monitor (4K, "primary" monitor in Windows, 1.5 DPI scaling) have a gap on the right, left, and bottom ends of the screen, but not on the top (where my taskbar is).
On my top monitor (1440p, 1.0 DPI scaling), it doesn't occur on the top of the screen or the bottom (where my taskbar is), but it does still happen on the left & right ends.

Other Software

Windows 11 x64 Pro (same behavior was occurring for me months ago on Windows 10 x64 Pro as well)
Everything Search 1.4 and 1.5a
Directory Opus 12.33
RemoveEmptyDirectories 2.2.0.0
nVIDIA Profile Inspector 2.4.0.4
ShellMenuView 1.4
ShellExView 2.01

[airdmo]

I have the same problem
Directory Opus 13.3
PowerToys0.78

Directory Opus cannot snap to the left or right edge of the screen
will leave a gap

[conradsrc]

Here's one program I recently noticed it on that may be worth mentioning: The Windows Control Panel!

This native program (using one of the many past-era UIs still accessible in Win11) is exhibiting the exact same behavior. It kinda looks like it's using some old Win7-era version of Windows Explorer? Obviously the current Win11 Windows Explorer doesn't do it but the Control Panel seems like a fairly significant program to affect. And maybe it being Microsoft code would make it easier for someone to diagnose what DWM setting/API call (?) causes this behavior.

[evinnichenko]

To add another program and issue: Notepad++ also suffers from this, and there are some gaps between the zones (see screenshots, red pixels).

[conradsrc]

Another program I've found that does it: JPEGview

Tried measuring it and it appears to be exactly 10 pixels short on the bottom & right sides, same as every other program I've seen exhibit this behavior.