Enable High DPI support (#231)

Source/GrasscutterTools/Utils/HighDPIUtil.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GrasscutterTools.Utils
+{
+    internal class HighDPIUtil
+    {
+        public static void SetDpiAwareness()
+        {
+            var dpiAwareness = ProcessDpiAwareness.PerMonitorDpiAware;
+            var hresult = SetProcessDpiAwareness(dpiAwareness);
+            if (hresult != 0)
+            {
+                throw new System.ComponentModel.Win32Exception(hresult);
+            }
+        }
+
+        [DllImport("shcore.dll")]
+        private static extern int SetProcessDpiAwareness(ProcessDpiAwareness value);
+
+        private enum ProcessDpiAwareness
+        {
+            DpiUnaware = 0,
+            SystemDpiAware = 1,
+            PerMonitorDpiAware = 2
+        }
+    }
+}