Win32 API を呼び出して、 PowerShell のコンソールウィンドウを隠すテスト

Show-Hide-Test.cmd

start /MIN powershell -File "%~dpn0.ps1"

Show-Hide-Test.ps1

# Hide Window
$asyncwindowType = Add-Type -Name Win32ShowWindowAsync -Namespace Win32Functions -PassThru -MemberDefinition '[DllImport("user32.dll")] public static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);';
$null = $asyncwindowType::ShowWindowAsync((Get-Process -PID $pid).MainWindowHandle, 0 <# SW_HIDE #>);

# Show MsgBox
Start-Sleep 1;
Add-Type -AssemblyName System.Windows.Forms;
$null = [System.Windows.Forms.MessageBox]::Show("Hello World");