About Side-by-Side Assemblies

A Windows side-by-side assembly is described by manifests. A side-by-side assembly contains a collection of resources—a group of DLLs, Windows classes, COM servers, type libraries, or interfaces—that are always provided to applications together. These are described in the assembly manifest.

Typically, a side-by-side assembly is a single DLL. For example, the Microsoft COMCTL32 assembly is a single DLL with a manifest whereas the Microsoft Visual C++ development system run-time libraries assembly contains multiple files. Manifests contain metadata that describes side-by-side assemblies and side-by-side assembly dependencies.

Side-by-side assemblies are used by the operating system as fundamental units of naming, binding, versioning, deployment, and configuration. Every side-by-side assembly has a unique identity. One of the attributes of the assembly identity is its version. For more information, see Assembly Versions.

Starting with WindowsВ XP, multiple versions of side-by-side assemblies can be used by applications running at the same time. Manifests, and the assembly version number, are used by the loader to determine the correct binding of assembly versions to applications. Side-by-side assemblies and manifests work with applications and the side-by-side manager as illustrated in the following figure.

In the preceding example, both Comctl32.DLL version 6.0 and Comctl32.DLL version 5.0 are in the side-by-side assembly cache and available to applications. When an application calls to load the DLL, the side-by-side manager determines whether the application has a version dependence described in a manifest. If there is no relevant manifest, the system loads the default version of the assembly. For WindowsВ XP, version 5.0 of Comctl32.DLL is the system default. If the side-by-side manager finds a dependence on version 6.0 stated in a manifest, that version is loaded to run with the application.

Several key system assemblies are being made available from Microsoft as side-by-side assemblies. For more information, see Supported Microsoft Side-by-side Assemblies. Application developers can also create their own side-by-side assemblies. For more information, see Guidelines for Creating Side-by-side Assemblies. In many cases it is possible to update existing applications to use side-by-side assemblies without having to change the application code.

Developers are encouraged to use side-by-side assemblies to create isolated applications, and to update existing applications into isolated applications for the following reasons:

• Side-by-side assemblies reduce the possibility of DLL version conflicts.
• Side-by-side assembly sharing enables multiple versions of COM or Windows assemblies to run at the same time.
• Applications and administrators can update assembly configuration on either a global or per-application configuration basis after deployment. For example, an application can be updated to use a side-by-side assembly that includes an update without having to reinstall the application.

Show windows side by side in windows 10

I’ve always right clicked on the taskbar and selected «Show windows side by side.» Now on my Windows 10 laptop, the two windows display very narrow and only on one half of the screen. Is there something I can do to make two documents display across the entire width of the screen?

***Post moved by the moderator to the appropriate forum category.***

Aero Snap is one of the interesting features of Windows 10 that automatically arrange windows by tiles or side by side. Here are the different methods on how you can customize your windows view on your desktop using Aero Snap:

Method 1: Side by side windows.

This method will make each window take half of the computer screen allowing you to arrange it side by side.

1. Press and hold Windows logo key.

2. Press the left or right arrow key.

Method 2: Vertical Snap

You can also use Aero Snap to maximize or minimize the open windows on your desktop.

1. Press and hold Windows logo key + Up arrow key to snap the window to the top halves of the screen.

2. Press and hold Windows logo key + Down arrow key to snap the window to the bottom halves of the screen.

3. Press Windows logo key + Up arrow key twice to maximize the window.

4. Press Windows logo key + Down arrow key twice to minimize the window.

Method 3: 2×2 Snap

2×2 Snap will let you put up to 4 windows on your desktop using a combination of the Windows logo key + left/right/up/down arrow key.

Don’t hesitate to reach out if you have other questions.

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Based on this thread and another in a different forum, the problem with side by side and stacked windows not working is due to a bug whereby various apps come up and appear to be on the desktop. When you do a side by side, you might have only 2 windows you see — everything else is minimised — but after the operation you wind up with screen real estate as if you were sharing with 2 3 4 or more shadow apps that do not show up.

If you use task manager, you will see phantom apps — e.g. calculator, calendar, skype, all of these come from C:\Program Files\WindowsApps. You might also see SystemSettings. If you kill these, you will generally find that Side-By-Side and Stacked windows behave as expected. Rarely, you may also have to stop/start (re-cycle explorer).

A guaranteed fix is to logoff (not reboot — just logoff) and login. Things work ok until you use a few modern apps and then they start to leak and screw things up.

Randomish8 (from other forum) may have reduced the problem to ApplicationFrameHost.exe as opposed to the mix of Apps I have stumbled across. I have not run into it yet but his solution may be more comprehensive.

I use Cygwin and I have a script that looks for processes in C:\Program Files\WindowsApps or named Systemsettings and kills those. If that is not sufficient I have another script that also recycles Explorer. So far that has always fixed things. I will try to look for ApplicationFrameHost.exe instead to see if that works.

In any event, you are not going nuts. The windows arrangement features works expected and as they always did when you log in and eventually degenerate as apps start to leak. Microsoft is definitely on the hook to fix this but in the meantime, there are ways of coping.

How to split screen on Windows 10 and view apps side by side

The Windows 10 split screen feature is excellent for multitasking, especially if you’re using a large display. You can view apps in Windows 10 side by side, on top of each other, or both, since it’s possible to snap up to four app windows on the screen at the same time. And with Snap Assist, getting each window right where you want it is easier than ever. Here is how to split screen on Windows 10 and view apps side by side:

First thing first: About Snap and Snap Assist in Windows

Snap is the official name for the Windows split screen feature, and it has been around since Windows 7. In earlier Windows versions, Snap allowed users to arrange two windows side by side, each taking up half of the screen, which is especially helpful when comparing two documents or when moving files from one place to another.

In Windows 10, the split screen has been upgraded. You can now also snap three or four app windows on your screen (one for each corner), and you can accomplish this using either your mouse, keyboard, or finger (if you have a touch screen). This lets you compare or copy and paste data without the hassle of switching windows and losing track of what you were doing.

As the name implies, Snap Assist is a feature that assists users in snapping windows side by side. If enabled, once you snap a window into place, Snap Assist lets you choose between your other open windows for the one you want to fit on the remainder of the screen.

Some apps cannot be used in split screen mode at all. Others, like the Photos app, can only be minimized to a certain extent while still being useful. Therefore, depending on your display, they might not resize automatically as you’d expect when snapping them to take up a quarter of your screen.

Enable Split screen (Snap) and related settings like Snap Assist in Windows 10

The Windows 10 split screen and its related settings should be enabled by default, but you can always make sure they are turned on. Open the Settings app by simultaneously pressing Win + I on your keyboard, and access System.

On the left-hand side, scroll if you need to, and access the Multitasking tab. The split screen settings are displayed on the right-hand side. To use Snap and Snap Assist efficiently, all the options in the “Work with multiple windows” section should be enabled. Make sure the Snap windows switch is On, and the three boxes underneath are checked.

How to view two applications side by side in Windows 10

The fastest way to use split screen and snap app windows is with keyboard shortcuts. Go to one of the windows you want to snap and press the Win + Left arrow keys simultaneously, to snap it to the left side of the screen, or Win + Right arrow to move it to the right half. If you prefer using the mouse or your touch screen to snap, click or press on the title bar of a window to grab it and drag it to the left or right edge of the screen. A transparent overlay appears, showing a preview of the window’s placement. Release the mouse button or take the finger off the screen to snap the window into the indicated space.

Whether you’re using your mouse or your keyboard, Snap Assist shows up on the empty half of the screen as soon as the first window is into place. Click or tap on the window you want to take up the other half of your screen. You can also use the arrow keys to move between the shown window previews and press Enter to choose the one you want taking up the remainder of the screen.

To exit Snap Assist without snapping a second app window, press the Esc key (or click or tap anywhere else on the screen). The snapped app window stays in place, and the other windows return to their initial position. Use the mouse or the keyboard shortcut corresponding to the free half of your screen if you want to snap a second window manually later on.

NOTE: You can easily resize the two side-by-side windows by clicking (or tapping on a touch screen, but it takes a few tries) on the dark divider line between them and dragging it to either side of the screen. Since they are snapped together, the windows resize simultaneously.

Hovering your cursor over the edge between the app windows highlights the divider line and makes it easier to click.

TIP: If you are using Tablet mode, there is an additional way to split your screen between two windows. For more details, read Windows 10 Tablet mode: Learn all about it and how to use it!

How to snap windows to the four corners of the screen using the keyboard in Windows 10

If you have a large display and you need to access more than two windows, you can use Corner Snap to fit three or four windows on your screen at the same time. If you prefer keyboard shortcuts, it’s easiest to first split your screen into two halves, as seen in the previous section, before using Corner Snap. Select one of the two windows snapped into place and use the keyboard shortcut Win + Up arrow, to move it to the upper corner of its half of the screen, or Win + Down arrow to reposition it in the lower corner.

As soon as the window is moved, Snap Assist pops up, asking you to select one of the other open windows to fill the empty part of your screen. Use the arrows to navigate between the previews and press Enter to select a third window to display on your screen.

Your screen is now split between three windows.

To show four apps, you can select the window that takes up half of your screen and repeat the process. First, press Win + Up arrow or Win + Down arrow to snap the window to one of the remaining corners, and then use Snap Assist to select another window for the empty corner showing the previews.

You now have four app windows displayed on your screen at the same time.

If you want to start setting up your split screen corner windows from scratch, and you want to do it using keyboard shortcuts, the process is a bit more complicated. Select a window and use Win + Right/Left arrow to first move it to a side of the screen. Then, without releasing the Windows key, use Win + Up/Down arrow to move it to the desired corner. Releasing the Windows key before the app is in a corner makes Snap Assist pop up, and your screen just gets split in half. If this happens, press Esc to exit Snap Assist, and continue with the second keyboard shortcut.

Once one corner is full, open another app window and use the same shortcuts to snap it into another corner. If you snap the first two windows on top of each other, Snap Assist pops up to fill the other half. But you can place them in opposite corners to avoid it. Keep in mind that Snap Assist appears only when there is no doubt over which part of your screen needs filling up.

You can use the same method to snap a third window into place. Snap Assist can no longer be avoided in this case and eagerly shows up to help with the remaining corner. Choose a fourth window to snap, and you are done.

How to snap windows to the four corners using the mouse in Windows 10

When it comes to fitting app windows into a quarter of the screen, the mouse is the best way to do it. Press the app’s title bar to grab it and drag it to one of the four corners of your screen to make the transparent overlay appear. Release the mouse button when you are happy with the placement preview.

You can then open another window you want to use and do the same. The Snap Assist pops up to help you when either the left or right half are free or when or a quarter of the screen remains empty. If you have a touch screen, you can also use your finger to drag and drop apps to the corner of the screen with this method. However, it might take several tries, because the overlay doesn’t always show up when it comes to Corner Snap.

How to split screen when using multiple monitors in Windows 10

Snapping windows side by side works pretty much the same in Windows 10 when you have two monitors or more. To learn more, read: How to snap Windows apps side by side and split the screen on two monitors.

How many apps do you use with split screen in Windows 10?

We like the split screen feature in Windows 10, but we generally use it with two windows only. Adding more apps makes them too small on our monitors, and we end up wasting time trying to find the info we need. What about you? Is your monitor big enough to fit four app windows on it? Do you use the split screen feature for work or fun? Let us know in the comments section below.