Press Win+I (Windows key plus upper case I) to launch Settings
Click Accessibility on the left then Keyboard on the right
Make sure the Use the Print screen button to open screen snipping is On
Press the PrtSc (Print Screen) key to launch the Snipping Tool
The screen will darken and show the capture tools at the top in the centre
Click on the capture tool you want to use
From the left the tools are:
When you release the mouse you will be prompted:
The screenshot is held on the clipboard
Click on the prompt if you wish to change the capture, or the X to finish the capture
Now you can Paste the screen capture image into any other app like WhatsApp Web on a Windows machine