porting shell from nuget to local

src/Shared/Microsoft.Windows.Shell/Standard/CREATESTRUCT.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Standard
+{
+	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+	internal struct CREATESTRUCT
+	{
+		public IntPtr lpCreateParams;
+
+		public IntPtr hInstance;
+
+		public IntPtr hMenu;
+
+		public IntPtr hwndParent;
+
+		public int cy;
+
+		public int cx;
+
+		public int y;
+
+		public int x;
+
+		public WS style;
+
+		[MarshalAs(UnmanagedType.LPWStr)]
+		public string lpszName;
+
+		[MarshalAs(UnmanagedType.LPWStr)]
+		public string lpszClass;
+
+		public WS_EX dwExStyle;
+	}
+}