C # implement automatic screen lock + off screen

Recently found the windows Lock screen API: lockworkstation

As a result, I integrated the previous screen-off API and made some things that I could choose to automatically lock the screen and turn off the screen.

As follows:CodeFragment:

Public form1 (bool alock ){

If (alock ){

// Screen lock + screen off

Lockworkstation ();

Sendmessage (this. Handle, (uint) 0x0112, (intptr) 0xf170, (intptr) 2 );

}

Else {

// Disable mouse and keyboard actions + screen off

Blockinput (true );

System. Threading. thread. Sleep (10 );

Sendmessage (this. Handle, (uint) 0x0112, (intptr) 0xf170, (intptr) 2 );

Blockinput (false );

}

This. Close ();

// Application. Exit ();

Environment. Exit (0 );

}

// Close the screen

[Dllimport ("user32.dll", charset = charset. Auto)]

Static extern intptr sendmessage (intptr hwnd, uint32 MSG, intptr wparam, intptr lparam );

// Disable mouse and keyboard actions

[Return: financialas (unmanagedtype. bool)]

[Dllimport ("user32.dll", charset = charset. Auto, exactspelling = true)]

Public static extern bool blockinput ([IN, financialas (unmanagedtype. bool)] bool fblockit );

// Screen lock

[Dllimport ("user32.dll")]

Public static extern bool lockworkstation ();

It should be noted that, in the exitProgramUse environment. Exit (0) instead of application. Exit (); otherwise, an error will occur ~~ The prompt is similar to: "*** an error occurs and you need to disable it ".

Also, modify main:

Static void main (string [] ARGs ){

// Application. enablevisualstyles ();

// Application. setcompatibletextrenderingdefault (false );

If (ARGs = NULL | args. Length = 0 ){

// Disable mouse and keyboard actions + screen off

Application. Run (New form1 (false ));

}

Else {

// Screen lock + screen off

Application. Run (New form1 (true ));

}

}

..

In this way, the success is achieved...

The reason why you want to disable the mouse and keyboard is to turn off the screen successfully ...~~~ Nonsense...

Create a shortcut and add a parameter to lock the screen.