Fix a global hotkey issues in CMD, which will hang Wox on init.

Wox.Infrastructure/Hotkey/KeyEvent.cs

@@ -0,0 +1,25 @@
+namespace Wox.Infrastructure.Hotkey
+{
+    public enum KeyEvent:int
+    {
+        /// <summary>
+        /// Key down
+        /// </summary>
+        WM_KEYDOWN = 256,
+
+        /// <summary>
+        /// Key up
+        /// </summary>
+        WM_KEYUP = 257,
+
+        /// <summary>
+        /// System key up
+        /// </summary>
+        WM_SYSKEYUP = 261,
+
+        /// <summary>
+        /// System key down
+        /// </summary>
+        WM_SYSKEYDOWN = 260
+    }
+}