Use .NET’s System.Drawing.Graphics.CopyFromScreen method from PowerShell. Create a Bitmap, copy pixels from the display into it, and save the bitmap as a PNG. The script below captures the primary monitor, writes a timestamped file in your Pictures folder, and disposes its graphics objects even when saving fails.
Capture the primary display as a PNG
This Windows desktop example uses Windows Forms to obtain the primary screen bounds and System.Drawing to copy the pixels. Microsoft defines CopyFromScreen as a bit-block transfer of color data from a screen rectangle to a Graphics drawing surface.
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$screen = [System.Windows.Forms.Screen]::PrimaryScreen
$bounds = $screen.Bounds
$bitmap = New-Object System.Drawing.Bitmap $bounds.Width, $bounds.Height
$graphics = [System.Drawing.Graphics]::FromImage($bitmap)
try {
$graphics.CopyFromScreen(
$bounds.Location,
[System.Drawing.Point]::Empty,
$bounds.Size
)
$pictures = [Environment]::GetFolderPath('MyPictures')
if ([string]::IsNullOrWhiteSpace($pictures)) {
$pictures = $env:TEMP
}
$fileName = 'screenshot-{0}.png' -f (Get-Date -Format 'yyyyMMdd-HHmmss')
$path = Join-Path $pictures $fileName
$bitmap.Save($path, [System.Drawing.Imaging.ImageFormat]::Png)
Write-Output $path
}
finally {
$graphics.Dispose()
$bitmap.Dispose()
}Run it in an interactive PowerShell window. The final line prints the complete path, for example C:UsersyouPicturesscreenshot-20260929-143012.png. PNG is lossless and is a sensible default for text, application windows and diagrams.
What each part of the script does
Load the required assemblies
Add-Type -AssemblyName System.Windows.Forms exposes screen information. Add-Type -AssemblyName System.Drawing supplies Bitmap, Graphics and image formats. These are Windows desktop APIs; do not assume the same code works unchanged on every PowerShell edition or operating system.
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Define the capture rectangle
PrimaryScreen.Bounds supplies the primary display’s location, width and height. CopyFromScreen receives a source point, a destination point inside the bitmap, and a Size. The bitmap must be at least as large as that size.
Release unmanaged resources
Graphics and Bitmap wrap native resources. The finally block disposes both objects whether the copy and save succeed or throw an exception. This prevents repeated captures from accumulating handles and memory.
Capture a selected rectangle
For a fixed region, replace the screen bounds with explicit screen coordinates. Coordinates are measured in screen pixels relative to the virtual desktop origin.
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Add-Type -AssemblyName System.Drawing
$left = 200
$top = 120
$width = 900
$height = 600
$bitmap = New-Object System.Drawing.Bitmap $width, $height
$graphics = [System.Drawing.Graphics]::FromImage($bitmap)
try {
$source = New-Object System.Drawing.Point $left, $top
$destination = [System.Drawing.Point]::Empty
$size = New-Object System.Drawing.Size $width, $height
$graphics.CopyFromScreen($source, $destination, $size)
$path = Join-Path $env:TEMP 'powershell-region.png'
$bitmap.Save($path, [System.Drawing.Imaging.ImageFormat]::Png)
$path
}
finally {
$graphics.Dispose()
$bitmap.Dispose()
}Use this form when the application window or dashboard always occupies a known area. If a window moves or changes size, discover its bounds first or use an interactive selection tool rather than hard-coding coordinates.
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To capture the entire desktop, use the virtual-screen rectangle rather than PrimaryScreen.Bounds. This includes monitors arranged to the left or above the primary display, so the virtual origin can have negative coordinates.
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$bounds = [System.Windows.Forms.SystemInformation]::VirtualScreen
$bitmap = New-Object System.Drawing.Bitmap $bounds.Width, $bounds.Height
$graphics = [System.Drawing.Graphics]::FromImage($bitmap)
try {
$graphics.CopyFromScreen($bounds.Left, $bounds.Top, 0, 0, $bounds.Size)
$path = Join-Path $env:TEMP 'virtual-desktop.png'
$bitmap.Save($path, [System.Drawing.Imaging.ImageFormat]::Png)
$path
}
finally {
$graphics.Dispose()
$bitmap.Dispose()
}Display arrangements, scaling and mixed-DPI settings can affect how coordinates map to pixels. Verify the result on the exact Windows and .NET configuration you intend to automate; broad behavior across PowerShell 5.1, PowerShell 7, modern .NET, and every multi-monitor arrangement is not guaranteed by this example.
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Choose another output format
Change the file extension and encoder passed to Save:
- PNG:
[System.Drawing.Imaging.ImageFormat]::Pngfor lossless text and interface captures. - JPEG:
[System.Drawing.Imaging.ImageFormat]::Jpegfor smaller photographic images, with some compression loss. - BMP:
[System.Drawing.Imaging.ImageFormat]::Bmpwhen an uncompressed bitmap is required.
Do not rely on the filename extension alone. The encoder supplied to Save determines the actual image format.
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Loop in an interactive session
Wrap the capture in a function and call it on a timer. Keep the resource creation and disposal inside the function so each iteration starts cleanly.
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function Save-ScreenShot {
param([string]$Path)
$bounds = [System.Windows.Forms.Screen]::PrimaryScreen.Bounds
$bitmap = New-Object System.Drawing.Bitmap $bounds.Width, $bounds.Height
$graphics = [System.Drawing.Graphics]::FromImage($bitmap)
try {
$graphics.CopyFromScreen($bounds.Location, [System.Drawing.Point]::Empty, $bounds.Size)
$bitmap.Save($Path, [System.Drawing.Imaging.ImageFormat]::Png)
}
finally {
$graphics.Dispose()
$bitmap.Dispose()
}
}
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$dir = Join-Path $env:TEMP 'screen-captures'
New-Item -ItemType Directory -Path $dir -Force | Out-Null
for ($i = 0; $i -lt 10; $i++) {
$name = 'capture-{0}.png' -f (Get-Date -Format 'yyyyMMdd-HHmmssfff')
Save-ScreenShot (Join-Path $dir $name)
Start-Sleep -Seconds 30
}Use Task Scheduler carefully
A scheduled task using this technique needs an interactive desktop. Configure the task to run only when the user is logged on. A task running non-interactively as SYSTEM has no visible desktop screen to copy. This is guidance from a Microsoft Q&A accepted answer, not a promise that every Windows configuration behaves identically.
- Save the script at a stable path, such as
C:Scriptscapture.ps1. - In Task Scheduler, create a task and set the trigger interval.
- On General, select Run only when user is logged on.
- On Actions, launch
powershell.exe(Windows PowerShell) with-NoProfile -ExecutionPolicy Bypass -File C:Scriptscapture.ps1, subject to your organization’s execution-policy rules. - Test while the target user is logged in and the display is unlocked.
Limitations and edge cases
- Locked or secure desktops: The API copies the desktop available to the process. Secure sign-in screens, elevation prompts and other protected surfaces may not be capturable.
- Protected video: DRM-protected or hardware-overlay content can appear black or incomplete.
- Cursor: The bitmap contains screen pixels; cursor inclusion is not established by the basic method. If the pointer matters, test your target environment and use a separate cursor-drawing approach.
- Visibility: Minimized, occluded or off-screen windows are not rendered as visible pixels for this kind of desktop capture.
- Permissions and failures:
CopyFromScreencan raise aWin32Exception. Check the source rectangle, display state and execution context before retrying. - PowerShell edition: Confirm that the required Windows desktop assemblies are available in the host you deploy. Do not assume Windows-only APIs provide a portable solution on non-Windows systems.
Troubleshoot common errors
| Symptom | Likely cause | Fix |
|---|---|---|
Unable to find type [System.Windows.Forms.Screen] |
The assembly was not loaded or the host lacks Windows Forms. | Run Add-Type -AssemblyName System.Windows.Forms and verify you are using a Windows desktop-capable PowerShell installation. |
Parameter is not valid while saving |
The destination directory does not exist, the file is locked, or the encoder/path is invalid. | Create the directory first, choose a new filename, and pass an explicit ImageFormat. |
| The image is black or incomplete | Protected content, a secure desktop, an overlay, or an incorrect capture context. | Test with an ordinary desktop window while logged in and unlocked; protected surfaces may not be capturable. |
| Scheduled file is missing | The task ran without an interactive desktop or under a different account. | Select Run only when user is logged on, use an absolute output path, and inspect Task Scheduler history. |
| Only one monitor appears | The script uses PrimaryScreen.Bounds. |
Use SystemInformation.VirtualScreen and test coordinates with your monitor arrangement. |
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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpThe equivalent Python call is:
import requests
r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
open("shot.webp", "wb").write(r.content)In Node.js:
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
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PowerShell screenshot checklist
- Run on a Windows desktop host with the required assemblies.
- Choose primary, virtual-desktop or explicit region bounds.
- Create a bitmap that matches the requested width and height.
- Call
CopyFromScreenand save with an explicit encoder. - Dispose
GraphicsandBitmapin afinallyblock. - For scheduled work, require an interactive logged-on session.
- Test protected content, scaling and monitor layouts on the deployment machine.
Frequently Asked Questions
Can I capture a browser page without capturing the whole desktop?
Not with CopyFromScreen alone; it copies a screen rectangle. Use a browser automation or website screenshot service when you need page rendering independent of window position.
Why does my output have a different pixel size than the monitor resolution?
Windows display scaling and mixed-DPI monitor arrangements can change coordinate and bitmap behavior. Measure the resulting file on the target machine instead of assuming logical dimensions equal physical pixels.
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