C# WinAPI - GetWindowPlacement

using System.Runtime.InteropServices;

[DllImport("user32.dll")]
internal static extern bool GetWindowPlacement(int hWnd, ref WINDOWPLACEMENT lpwndpl);

internal struct WINDOWPLACEMENT
{
	public int length;
	public int flags;
	public ShowWindowCommands showCmd;
	public System.Drawing.Point ptMinPosition;
	public System.Drawing.Point ptMaxPosition;
	public System.Drawing.Rectangle rcNormalPosition;
}
 
internal enum ShowWindowCommands : int
{
	Hide = 0,
	Normal = 1,
	Minimized = 2,
	Maximized = 3,
}
 
internal enum WNDSTATE : int
{
	SW_HIDE = 0,
	SW_SHOWNORMAL = 1,
	SW_NORMAL = 1,
	SW_SHOWMINIMIZED = 2,
	SW_MAXIMIZE = 3,
	SW_SHOWNOACTIVATE = 4,
	SW_SHOW = 5,
	SW_MINIMIZE = 6,
	SW_SHOWMINNOACTIVE = 7,
	SW_SHOWNA = 8,
	SW_RESTORE = 9,
	SW_SHOWDEFAULT = 10,
	SW_MAX = 10
}
 
private static WINDOWPLACEMENT GetPlacement(int hwnd)
{
	WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
	placement.length = Marshal.SizeOf(placement);
	GetWindowPlacement(hwnd, ref placement);
	return placement;
}
 
private void GetWindowPos(int hwnd, ref int ptrPhwnd, ref int ptrNhwnd, ref Point ptPoint, ref Size szSize, ref WNDSTATE intShowCmd)
{
	WINDOWPLACEMENT wInf = new WINDOWPLACEMENT();
	wInf.length = System.Runtime.InteropServices.Marshal.SizeOf(wInf);
	GetWindowPlacement(hwnd, ref wInf);
	szSize = new Size(wInf.rcNormalPosition.Right - (wInf.rcNormalPosition.Left * 2),wInf.rcNormalPosition.Bottom - (wInf.rcNormalPosition.Top * 2));
	ptPoint = new Point(wInf.rcNormalPosition.Left, wInf.rcNormalPosition.Top);
}