diff --git a/FDK19/コード/01.フレームワーク/Core/GameWindow.cs b/FDK19/コード/01.フレームワーク/Core/GameWindow.cs
index e4cf1509..5abd21e8 100644
--- a/FDK19/コード/01.フレームワーク/Core/GameWindow.cs
+++ b/FDK19/コード/01.フレームワーク/Core/GameWindow.cs
@@ -293,8 +293,20 @@ namespace SampleFramework
 
 		#region #23510 2010.11.14 yyagi add: 縦横比固定でのウインドウサイズ変更 定数定義 from http://www.vcskicks.com/maintain-aspect-ratio.php
 		//double so division keeps decimal points
-		const double widthRatio = SampleFramework.GameWindowSize.Width;
-		const double heightRatio = SampleFramework.GameWindowSize.Height;
+		double widthRatio
+        {
+            get
+            {
+                return SampleFramework.GameWindowSize.Width;
+            }
+        }
+		double heightRatio
+        {
+            get
+            {
+                return SampleFramework.GameWindowSize.Height;
+            }
+        }
 		const int WM_SIZING = 0x214;
 		const int WMSZ_LEFT = 1;
 		const int WMSZ_RIGHT = 2;
diff --git a/FDK19/コード/01.フレームワーク/Core/GameWindowSize.cs b/FDK19/コード/01.フレームワーク/Core/GameWindowSize.cs
index bd06fa4f..6f06826a 100644
--- a/FDK19/コード/01.フレームワーク/Core/GameWindowSize.cs
+++ b/FDK19/コード/01.フレームワーク/Core/GameWindowSize.cs
@@ -4,7 +4,7 @@ namespace SampleFramework
 {
 	public static class GameWindowSize
 	{
-		public const int Width = 1280;
-		public const int Height = 720;
+		public static int Width = 1280;
+		public static int Height = 720;
 	}
 }
diff --git a/TJAPlayer3/Common/CSkin.cs b/TJAPlayer3/Common/CSkin.cs
index 40d8bdfb..c30f1829 100644
--- a/TJAPlayer3/Common/CSkin.cs
+++ b/TJAPlayer3/Common/CSkin.cs
@@ -1087,6 +1087,14 @@ namespace TJAPlayer3
                             {
                                 this.Skin_Creator = strParam;
                             }
+                            /*else if (strCommand == "Resolution")
+                            {
+                                string[] strSplit = strParam.Split(',');
+                                for (int i = 0; i < 2; i++)
+                                {
+                                    Resolution[i] = int.Parse(strSplit[i]);
+                                }
+                            }*/
                             #endregion
 
                             #region [Background Scroll]
@@ -2653,10 +2661,11 @@ namespace TJAPlayer3
         public string Skin_Name = "Unknown";
         public string Skin_Version = "Unknown";
         public string Skin_Creator = "Unknown";
+        public int[] Resolution = new int[] { 1280, 720 };
         #endregion
-        
+
         #region Config
-
+
         public int Config_ItemText_Correction_X = 0;
         public int Config_ItemText_Correction_Y = 0;
 
diff --git a/TJAPlayer3/Common/TJAPlayer3.cs b/TJAPlayer3/Common/TJAPlayer3.cs
index 4cbc157f..77672579 100644
--- a/TJAPlayer3/Common/TJAPlayer3.cs
+++ b/TJAPlayer3/Common/TJAPlayer3.cs
@@ -1042,6 +1042,7 @@ namespace TJAPlayer3
 								//-----------------------------
 									#endregion
 							}
+							return;
 						}
 						//-----------------------------
 						#endregion
@@ -2282,7 +2283,10 @@ for (int i = 0; i < 3; i++) {
 			try
 			{
 				Skin = new CSkin( TJAPlayer3.ConfigIni.strSystemSkinSubfolderFullName, false);
-				TJAPlayer3.ConfigIni.strSystemSkinSubfolderFullName = TJAPlayer3.Skin.GetCurrentSkinSubfolderFullName( true );	// 旧指定のSkinフォルダが消滅していた場合に備える
+				TJAPlayer3.ConfigIni.strSystemSkinSubfolderFullName = TJAPlayer3.Skin.GetCurrentSkinSubfolderFullName( true );  // 旧指定のSkinフォルダが消滅していた場合に備える
+
+				ChangeResolution(TJAPlayer3.Skin.Resolution[0], TJAPlayer3.Skin.Resolution[1]);
+
 				Trace.TraceInformation( "スキンの初期化を完了しました。" );
 			}
 			catch (Exception e)
@@ -3071,7 +3075,29 @@ for (int i = 0; i < 3; i++) {
 				Trace.TraceInformation( this.listプラグイン.Count + " 個のプラグインを読み込みました。" );
 		}
 
-        public void RefleshSkin()
+		private void ChangeResolution(int nWidth, int nHeight)
+		{
+			if (base.GraphicsDeviceManager.CurrentSettings.BackBufferWidth == nWidth ||
+				base.GraphicsDeviceManager.CurrentSettings.BackBufferHeight == nHeight)
+				return;
+
+			currentClientSize = this.Window.ClientSize;
+
+			var state = base.Window.WindowState;
+
+			SampleFramework.GameWindowSize.Width = nWidth;
+			SampleFramework.GameWindowSize.Height = nHeight;
+
+			base.GraphicsDeviceManager.CurrentSettings.BackBufferWidth = nWidth;
+			base.GraphicsDeviceManager.CurrentSettings.BackBufferHeight = nHeight;
+
+			base.GraphicsDeviceManager.ChangeDevice(base.GraphicsDeviceManager.CurrentSettings);
+
+			base.Window.ClientSize = new Size(currentClientSize.Width, currentClientSize.Height);
+			base.Window.WindowState = state;
+		}
+
+		public void RefleshSkin()
         {
             Trace.TraceInformation("スキン変更:" + TJAPlayer3.Skin.GetCurrentSkinSubfolderFullName(false));
 
@@ -3080,10 +3106,12 @@ for (int i = 0; i < 3; i++) {
             TJAPlayer3.Skin.Dispose();
             TJAPlayer3.Skin = null;
             TJAPlayer3.Skin = new CSkin(TJAPlayer3.ConfigIni.strSystemSkinSubfolderFullName, false);
-
-
-            TJAPlayer3.Tx.DisposeTexture();
-            TJAPlayer3.Tx.LoadTexture();
+
+			TJAPlayer3.Tx.DisposeTexture();
+
+			ChangeResolution(TJAPlayer3.Skin.Resolution[0], TJAPlayer3.Skin.Resolution[1]);
+
+			TJAPlayer3.Tx.LoadTexture();
 
             TJAPlayer3.act文字コンソール.On活性化();
         }