How to find a desktop window (by window name) in Windows 8.1 Update 2 OS, using the Win32 API FindWindow() in PowerShell environment?

Question

I don\'t remember having any problem finding a window in older Windows OS\'s, but, I\'m not succeeding in Windows 8.1 Update 2 OS, using PowerShell v4.0.

Answer 1

The following code works fine for me, thanks to @zyq's advice

[System.Windows.Forms.MessageBox]::Show('Test', 'PowerShell Dialog', 
        [Windows.Forms.MessageBoxButtons]::OK, 
        [Windows.Forms.MessageBoxIcon]::Information, 
        [Windows.Forms.MessageBoxDefaultButton]::Button1,
        [Windows.Forms.MessageBoxOptions]::ServiceNotification
        )

$Win32API = Add-Type -Name Funcs -Namespace Win32 -PassThru -MemberDefinition @'
    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr FindWindow(string lpClassName, IntPtr lpWindowName);

    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr FindWindow(IntPtr lpClassName, string lpWindowName);
'@

$Win32API::FindWindow('#32770',       'PowerShell Dialog')
$Win32API::FindWindow([IntPtr]::Zero, 'PowerShell Dialog')
$Win32API::FindWindow('#32770',       [IntPtr]::Zero)
$Win32API::FindWindow('Notepad',      [IntPtr]::Zero)