Simple Runtime Window Editor (SRWE) - a program that allows you to pick a running application and manipulate size, position, styles of its main/child windows. SRWE was built to maintain games that run in Windowed-mode. For example, you can get the fullscreen-mode effect on a windowed-mode game or get fullscreen effect with visible taskbar. Since SRWE allows you to manually set up any window size or position, it can be useful in taking high-resolution screenshots in games that support windowed-mode.
Hotsampling games for screenshots
To take screenshots from games it's often better to run the game on a high resolution. This will likely make the game run slower than normal, but for taking screenshots this is OK. To set the game to a (much) higher resolution, SRWE can be used. This is called hotsampling. Not all games support this feature, however: the game has to resize its viewport (the area of the window which displays the game's graphics) when the game's window (the frame/border around the viewport) is being resized. A lot of games simply stretch the viewport or create black borders around it. However some games do resize the viewport and for these games you can use SRWE to resize them when you want to take screenshots.
To test whether a game supports hotsampling, run the game in windowed mode so you'll have a border around the viewport. Now drag with the mouse the border to a direction to increase the window size. When you release the left mouse button, the viewport of the game should resize. If the viewport adapts to the new window size, the game can be hotsampled. Games like Skyrim SE, all frostbyte games, Rise of the Tomb Raider support hotsampling.
How to hotsample a game
To hotsample a game, it's key to run the game in windowed mode. To do this you have to select this mode in the game's graphics options. Additionally, you have to run the game as administrator. Now start the game, press alt-tab and as administrator, also start SRWE. In SRWE, click Select running Application from the toolbar. The window that pops up should enlist the game's .exe process. Select that process from the list and click Open.
SRWE is now attached to the game window, and you can now manipulate the window. SRWE will show you all kinds of characteristics of the
game's window, like its size, position, but also flags which Windows uses to define how a window looks. These are available on
the 'Windows Styles' tab. For instance, you can change whether the window has a title bar or min/max buttons by checking/unchecking
the checkboxes of
WS_DLGFRAME. For games these aren't that important.
To set the game's window to a high resolution, just type the resolution you want in the Width and Height text boxes. SRWE will update the window immediately. For most games this is enough to set the game window to a higher resolution. If you want to get rid of the borders around the window, just click the Remove borders button.
Some games don't seem to work with SRWE, even though they passed the manual resize test. This is because their internal windows handling
code waits for a sign from Windows that the user has finished resizing the window. This sign usually comes when you release the left-mouse
button after manually resizing the windows. These signs are called messages. With SRWE we basically trick the window it is attached to
that a user has resized the window manually by sending it these messages, like a size message that the window size has changed. For some
games, this is enough. For other games this isn't enough, they deliberately wait for the 'I'm done!' message. This particularly message is
WM_EXITSIZEMOVE, and you can tell SRWE to send this message as well, by checking the Force EXITSIZEMOVE after window resize
Some games, like Dragon Age:Inquisition, it's required to check this checkbox. For others, like Rise of the Tomb Raider, checking this checkbox actually causes resizing the window through SRWE to be stretching. It's therefore a trial/error process whether to check this checkbox or not. But it's easy to find out (just try whether checking the checkbox helps solve it or not), and SRWE will remember the state of the checkbox.
Remember, not all games support hotsampling. SRWE isn't a piece of magic that can enable functionality in a game that's not implemented by its developers: it simply mimics a user's resize actions on a windowed game. If the game itself doesn't anticipate on resize actions (most games ignore any resize action on the window, sadly) then SRWE can't add that functionality, only the game developers can.
It's of course tedious to type in a resolution each time, clicking borders off/on, etc. To solve that, SRWE allows you to save the
current state of SRWE as a Profile. To do this, simply click Save Profile. Any saved profile will be added to the list of
Recent profiles, so you can quickly pick a profile from that list instead of typing the resolution in again. To get started,
you can choose any of the profiles in the SRWE repository, and load these with
the Load Profile button after you've downloaded them and stored them in a folder. Download the profiles from the
Releases tab on GitHub in the
SRWE-Example-Profiles.zip file. They're just examples: if you want to have different
resolutions, just load one of them, alter the resolution and save it under a different name.