diff --git a/src/Libraries/DockPanel_Src/WinFormsUI/Win32/Structs.cs b/src/Libraries/DockPanel_Src/WinFormsUI/Win32/Structs.cs
index 2b91f00c4e..1080486051 100644
--- a/src/Libraries/DockPanel_Src/WinFormsUI/Win32/Structs.cs
+++ b/src/Libraries/DockPanel_Src/WinFormsUI/Win32/Structs.cs
@@ -136,10 +136,10 @@ namespace WeifenLuo.WinFormsUI.Win32
 	[StructLayout(LayoutKind.Sequential)]
 	internal struct CREATESTRUCT 
 	{
-		public int lpCreateParams;
-		public int hInstance;
-		public int hMenu;
-		public int hWndParent;
+        public IntPtr lpCreateParams;
+        public IntPtr hInstance;
+        public IntPtr hMenu;
+        public IntPtr hWndParent;
 		public int cy;
 		public int cx;
 		public int y;
@@ -155,20 +155,20 @@ namespace WeifenLuo.WinFormsUI.Win32
 	{
 		public string szClass;
 		public string szTitle;
-		public int hOwner;
+        public IntPtr hOwner;
 		public int x;
 		public int y;
 		public int cx;
 		public int cy;
 		public int style;
-		public int lParam;
+		public IntPtr lParam;
 	}
 
 	[StructLayout(LayoutKind.Sequential)]
 	internal struct WINDOWPOS 
 	{
-		public int hwnd;
-		public int hWndInsertAfter;
+		public IntPtr hwnd;
+        public IntPtr hWndInsertAfter;
 		public int x;
 		public int y;
 		public int cx;
diff --git a/src/Main/StartUp/Project/StartUp.csproj b/src/Main/StartUp/Project/StartUp.csproj
index 31ddb5f416..521efbf88f 100644
--- a/src/Main/StartUp/Project/StartUp.csproj
+++ b/src/Main/StartUp/Project/StartUp.csproj
@@ -17,7 +17,7 @@
     <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
     <RegisterForComInterop>False</RegisterForComInterop>
     <GenerateSerializationAssemblies>Auto</GenerateSerializationAssemblies>
-    <PlatformTarget>x86</PlatformTarget>
+    <PlatformTarget>AnyCPU</PlatformTarget>
     <FileAlignment>4096</FileAlignment>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
   </PropertyGroup>