Turn off Screen.bat

powershell (Add-Type '[DllImport(\"user32.dll\")]^public static extern int PostMessage(int hWnd, int hMsg, int wParam, int lParam);' -Name a -Pas)::PostMessage(-1,0x0112,0xF170,2)

Why is this using SendMessage? Wouldn't PostMessage be a better fit as you don't have to wait for a response, especially since you're sending to all top level windows, where all of which may not play nice?

@Ma-XX-oN This piece of code originally came from stackoverflow. I copied it years back and I can't quite remember the source post. Anyway, it "just did the job" for me back then and I didn't give it much thought. If someone uses this, it is probably a good idea to take note of your comment.

Well, if anyone wishes to have that code, here it is:

powershell (Add-Type '[DllImport(\"user32.dll\")]^public static extern int PostMessage(int hWnd, int hMsg, int wParam, int lParam);' -Name a -Pas)::PostMessage(-1,0x0112,0xF170,2)

I found that using SendMessage resulted in the command to stall because it was waiting for a response.

@Ma-XX-oN Thanks. I've updated the gist with your code.

is there a way to tell it to which of the multimonitor setup to turn off ?

Not that I'm aware of. AFAIK, it just turns off all of them.

Very nice. I dropped it into my scripts folder and placed a shortcut on my desktop. I already had something similar on Linux and I am glad to see someone already did this for Windows.

Great script! Just a note, .NET 3.5 is required on Windows 11 for this to function. Otherwise you'd get mscoree.dll error.