add KeyboardHook

src/Shared/HandyControl_Shared/Tools/Interop/NativeMethods.cs

@@ -31,6 +31,8 @@ namespace HandyControl.Tools.Interop
             NIIF_INFO = 0x00000001,
             NIIF_WARNING = 0x00000002,
             NIIF_ERROR = 0x00000003,
+            WM_KEYDOWN = 0x0100,
+            WM_KEYUP = 0x0101,
             WM_MOUSEMOVE = 0x0200,
             WM_LBUTTONDOWN = 0x0201,
             WM_LBUTTONUP = 0x0202,

src/Shared/HandyControl_Shared/Tools/Interop/UnsafeNativeMethods.cs

@@ -186,7 +186,8 @@ namespace HandyControl.Tools.Interop
 
         public enum HookType
         {
-            WH_MOUSE_LL = 14,
+            WH_KEYBOARD_LL = 13,
+            WH_MOUSE_LL = 14
         }
 
         [StructLayout(LayoutKind.Sequential)]