If you aren’t logged in, enter your Skype email address (or phone number) and password to continue. If you’re on Windows, make sure you’re using the downloadable version of Skype—not the pre-installed Windows version.
You can share your screen while on audio calls and while on video calls. If your recipient calls you, click your preferred Answer button.
You can also click the Share your screen drop-down box at the top of the pop-up window and select Share a window to specify a window to share.