SuspendSleep.ps1

# Use Set-thread-execution-state to prevent the computer sleeping. From something of Den Delimarsky's at https://den.dev/blog/caffeinate-windows/
Param ([switch]$Now,  [switch]$AndDisplay )

if (-not ('win32.system' -as [type])) {Add-Type -Name System -Namespace Win32 -MemberDefinition @"
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern void SetThreadExecutionState(uint esFlags);
"@}

function Suspend-Sleep {
    param ([switch]$AndDisplay)
    $ES_DISPLAY_REQUIRED  =  [uint32]'0x00000002' 
    $ES_SYSTEM_REQUIRED   =  [uint32]'0x00000001' 
    $ES_CONTINUOUS        =  [uint32]'0x80000000' 

    if ($AndDisplay) {[win32.system]::SetThreadExecutionState($ES_CONTINUOUS -bor  $ES_DISPLAY_REQUIRED)}
    else             {[win32.system]::SetThreadExecutionState($ES_CONTINUOUS -bor  $ES_SYSTEM_REQUIRED )}
}

function Resume-Sleep {[win32.system]::SetThreadExecutionState([uint32]0) }

if ($Now -or $AndDisplay) {Suspend-Sleep -AndDisplay:$AndDisplay}