Fix bugs

Windows Store Downloader.csproj

@@ -37,7 +37,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <Prefer32Bit>false</Prefer32Bit>
+    <Prefer32Bit>true</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

code/Form1.cs

@@ -2,6 +2,7 @@
 using System.Diagnostics;
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
@@ -173,15 +174,20 @@ private void Form1_Load(object sender, EventArgs e)
             {
                 this.TransparencyKey = Color.FromArgb(0xf1f1f0);//R不等于B
                 RefreshForm();
-                Acrylic.setBlur(this.Handle, 0x30f2f2f2);//亚克力效果
+                SetBlur1(this.Handle, 0x3FFFFFFF);//亚克力效果
             }//WIN10亚克力
 
-
-
-
-
         }
-
+        private void SetBlur1(IntPtr hWnd,int gradientColor)
+        {
+            if (File.Exists("acrylic.dll") == false)
+            {
+                MessageBox.Show("acrylic.dll not found.Please put the dll to current directory." +
+                    "\n无法找到acrylic.dll。请把它放到当前目录。");
+                Environment.Exit(0);
+            }
+            Acrylic.SetBlur(hWnd, gradientColor);
+        }//容错dll
         private void Chinese_Lang()
         {
             Language.Chinese_Lang();
@@ -404,7 +410,8 @@ class User32
     }//淡入淡出
     class Acrylic
     {
-        [DllImport("acrylic")]
-        public static extern void setBlur(IntPtr hWnd, int gradientColor);
+
+        [DllImport("acrylic", CharSet = CharSet.Auto, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void SetBlur(IntPtr hWnd, int gradientColor);
     }
 }