make powershell and cmd terminals transparent

Add-WindowTransparencyToProfile.ps1

if (-not Test-Path -Path $profile) { New-Item -path $profile -type file -force }
Add-Content -Path $profile -Value '$user32 = Add-Type -Name ''User32'' -Namespace ''Win32'' -PassThru -MemberDefinition ''[DllImport("user32.dll")]public static extern int GetWindowLong(IntPtr hWnd, int nIndex);[DllImport("user32.dll")]public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);[DllImport("user32.dll", SetLastError = true)]public static extern bool SetLayeredWindowAttributes(IntPtr hWnd, uint crKey, int bAlpha, uint dwFlags);'''
Add-Content -Path $profile -Value 'Get-Process | Where-Object { @(''powershell'', ''cmd'') -contains $_.ProcessName } | % { $user32::SetWindowLong($_.MainWindowHandle, -20, ($user32::GetWindowLong($_.MainWindowHandle, -20) -bor 0x80000)) | Out-Null;$user32::SetLayeredWindowAttributes($_.MainWindowHandle, 0, 200, 0x02) | Out-Null }'

Set-WindowTransparency.ps1

function Set-WindowTransparency {
  param (
    [ValidateRange(0, 255)] 
    [int] $transparency = 200,
    [string[]] $processes = @('powershell', 'cmd')
  )
  $user32 = Add-Type -Name 'user32' -Namespace 'Win32' -PassThru -MemberDefinition @'
  
  [DllImport("user32.dll")]
  public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
  
  [DllImport("user32.dll")]
  public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
  
  [DllImport("user32.dll", SetLastError = true)]
  public static extern bool SetLayeredWindowAttributes(IntPtr hWnd, uint crKey, int bAlpha, uint dwFlags);

'@
  
  Get-Process | Where-Object { $processes -contains $_.ProcessName } | % {
    $wl = $user32::GetWindowLong($_.MainWindowHandle, -20)
    $user32::SetWindowLong($_.MainWindowHandle, -20, ($wl -bor 0x80000)) | Out-Null
    $user32::SetLayeredWindowAttributes($_.MainWindowHandle, 0, $transparency, 0x02) | Out-Null
  }
}

This is awesome and it does work for other windows too!