PowerShell 技能连载 - 将窗口置于前台

PowerShell 可以使用 Add-Type 来操作 Windows 内置的 API 功能。通过这种方法，可以很容易地将所有进程的窗口置于前台。以下是您需要的函数：

#requires -Version 2
function Show-Process($Process, [Switch]$Maximize)
{
  $sig = '
    [DllImport("user32.dll")] public static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);
    [DllImport("user32.dll")] public static extern int SetForegroundWindow(IntPtr hwnd);
  '

  if ($Maximize) { $Mode = 3 } else { $Mode = 4 }
  $type = Add-Type -MemberDefinition $sig -Name WindowAPI -PassThru
  $hwnd = $process.MainWindowHandle
  $null = $type::ShowWindowAsync($hwnd, $Mode)
  $null = $type::SetForegroundWindow($hwnd)
}

要测试 Show-Process，以下是一段示例代码，演示如何使用它：

# launch Notepad minimized, then make it visible
$notepad = Start-Process notepad -WindowStyle Minimized -PassThru
Start-Sleep -Seconds 2
Show-Process -Process $notepad
# switch back to PowerShell, maximized
Start-Sleep -Seconds 2
Show-Process -Process (Get-Process -Id $PID) -Maximize
# switch back to Notepad, maximized
Start-Sleep -Seconds 2
Show-Process -Process $notepad -Maximize
# switch back to PowerShell, normal window
Start-Sleep -Seconds 2
Show-Process -Process (Get-Process -Id $PID)