Add-Type -AssemblyName system.Windows.Forms
Add-Type -AssemblyName system.Drawing
$Form = New-Object windows.Forms.Form
$Form.Size = New-Object drawing.Size(200, 120)

$Form.startposition = "centerscreen"
$Form.Text = "Test of Form"
$Form.MaximizeBox = $false
$Form.MinimizeBox = $false
$Form.Font = New-Object drawing.Font("Times New Roman", 10, [Drawing.FontStyle]::Bold)

$Form.BackColor = "LightBlue"
$Form.FormBorderStyle = "FixedSingle"
$Form.ShowDialog()
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cls
#Windows API
$code=@'
    using System.Runtime.InteropServices;
    public static class WinApi{
        public struct Rect {
            public uint left;
            public uint top;
            public uint right;
            public uint bottom;
        };
        [DllImport("user32.dll")]
        public static extern bool SetWindowPos(uint hwnd,uint hpart,uint x,uint y,uint cx,uint cy,uint flags);
        [DllImport("user32.dll")]
        public static extern bool GetWindowRect(uint hwnd,ref Rect rect);
    }
'@
Add-Type -TypeDefinition $code
Add-Type -AssemblyName system.Windows.Forms
Add-Type -AssemblyName system.Drawing


$Form = New-Object windows.Forms.Form
$Form.Size = New-Object drawing.Size(200, 120)

$Form.Text = "Test of Form"
$Form.MaximizeBox = $false
$Form.MinimizeBox = $false
$Form.Font = New-Object drawing.Font("Times New Roman", 10, [Drawing.FontStyle]::Bold)

$Form.BackColor = "LightBlue"
$Form.FormBorderStyle = "FixedSingle"

$rect = New-Object 'WinApi+Rect'
$hwnd = (Get-Process notepad -ErrorAction SilentlyContinue| Select-Object -First 1).MainWindowHandle
if($hwnd -eq $null){
    $Form.StartPosition = 'CenterScreen'
} else {
    [void][WinApi]::GetWindowRect([int32]$hwnd,[ref]$rect)
    $x = $rect.left + ($rect.right - $rect.left - $Form.Width)/2
    $y = $rect.top + ($rect.bottom - $rect.top - $Form.Height)/2
    [WinApi]::SetWindowPos([int32]$Form.Handle,$null,$x,$y,0,0,1)
}

$Form.ShowDialog()
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cls
#Windows API
$code=@'
    using System.Runtime.InteropServices;
    public static class WinApi{
        [DllImport("user32.dll")]
        public static extern bool SetWindowPos(uint hwnd,uint hpart,uint x,uint y,uint cx,uint cy,uint flags);
        [DllImport("user32.dll")]
        public static extern bool GetWindowRect(uint hwnd,uint[] arr);
        [DllImport("user32.dll")]
        public static extern bool ShowWindow(uint hwnd,uint show);
    }
'@
Add-Type -TypeDefinition $code
Add-Type -AssemblyName system.Windows.Forms
Add-Type -AssemblyName system.Drawing


$Form = New-Object windows.Forms.Form
$Form.Size = New-Object drawing.Size(200, 120)

$Form.Text = "Test of Form"
$Form.MaximizeBox = $false
$Form.MinimizeBox = $false
$Form.Font = New-Object drawing.Font("Times New Roman", 10, [Drawing.FontStyle]::Bold)

$Form.BackColor = "LightBlue"
$Form.FormBorderStyle = "FixedSingle"

$hwnd = (Get-Process notepad -ErrorAction SilentlyContinue| Select-Object -First 1).MainWindowHandle
if($hwnd -eq $null){
    $Form.StartPosition = 'CenterScreen'
} else {
    $arr = New-Object 'int32[]'(4)
    [void][WinApi]::ShowWindow([int32]$hwnd,1)
    [void][WinApi]::GetWindowRect([int32]$hwnd,$arr)
    $x = $arr[0] + ($arr[2] - $arr[0] - $Form.Width)/2
    $y = $arr[1] + ($arr[3] - $arr[1] - $Form.Height)/2
    [void][WinApi]::SetWindowPos([int32]$Form.Handle,$null,$x,$y,0,0,1)
}

$Form.ShowDialog()
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$code=@'
    public static class A{
        public static class A1 {}
    }
    public static class B{
        public struct B1 {}
        public class B2{}
    }
    public class C{
        public class C1{}
    }
    public struct D{}
'@
Add-Type -TypeDefinition $code

#A & A+A1 & B 为静态类不能实例化对象
New-Object 'B+B1'
New-Object 'B+B2'
New-Object 'C'
New-Object 'C+C1'
New-Object 'D'
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