CODEWITHSUNDEEP
winformsc#-4.0locked
Ashish Rathore
Ashish Rathore

Reputation: 2696

Show windows form over locked screen

I'm developing an application to run in background. This application is used to capture user’s activity on their system. Application is working very fine.

Now, I need to display a windows form over locked screen. Just like this:

enter image description here

Can any one help me! How can I show any windows form over locked screen?

Upvotes: 2

Views: 2216

Answers (2)

Xellzul
Xellzul

Reputation: 1

I know this is an old question but for anyone still looking:

It is a security risk don't do it.

If you still want to do it this could help: SampleHardwareEventCredentialprovider

You will have to play with WinAPI and CredentialProviders but it is working demo and will show simple windows dialog with a button at lockscreen

Upvotes: 0

Freddy Ayala
Freddy Ayala

Reputation: 49

Not possible, for security reasons no application should be shown when the screen is locked.

The only thing remotely similiar might be a Kiosk App:

Is the Windows.ApplicationModel.LockScreen namespace available for non-kiosk use?

There are a few different things here that are probably confusing things. unfortunately they are not very common scenarios so documentation is lacking.

You can use the Windows.ApplicationModel.LockScreen namespace for customising the display of the lock screen. This can be used to change the wallpaper or notification counts. It is probably the most common form of lock screen customization as it can be done by any app.

You can also use the functionality in this namespace to create an alternative lock screen. This could have different behaviour to the process of swipe up and enter password/PIN or Microsoft Hello face detection. Creating such an app and distributing through the store requires extra permissions than 3rd party developers typically have.

"Kiosk mode" apps are created as apps that run above the lock screen. Such apps have no real connection to lock screen replacements but are related in their use of similar underlying elements of the OS.

In terms of what you are trying to achieve, it sounds like you should be able to do this by declaring the windows.lockScreen extension and then using LockApplicationHost to do the actual unlocking. As mentioned above the lack of a way for 3rd parties to distribute such apps through the store means there is a lack of documentation in this area but it should be possible.

One thing to take note of in such an app is an under even greater memory/resource constraints than a typical app and so you should keep this in mind during your planning and development.

Upvotes: 1

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