Code Quality: Replaced DllImport calls with CsWin32 generations for keyboard character enumerations (#17119)

Author: Lamparter

src/Files.App.CsWin32/NativeMethods.txt

@@ -225,3 +225,6 @@ _SICHINTF
 RoGetAgileReference
 IQueryInfo
 QITIPF_FLAGS
+GetKeyboardState
+MapVirtualKey
+GetKeyboardLayout

src/Files.App/Data/Commands/HotKey/HotKey.cs

@@ -4,6 +4,7 @@
 using System.Collections.Frozen;
 using System.Runtime.InteropServices;
 using System.Text;
+using Windows.Win32;
 using Forms = System.Windows.Forms;
 
 namespace Files.App.Data.Commands
@@ -374,17 +375,17 @@ private static string GetKeyCharacter(Forms.Keys key)
 			var state = new byte[256];
 
 			// Get the current keyboard state
-			if (!Win32PInvoke.GetKeyboardState(state))
+			if (!PInvoke.GetKeyboardState(state))
 				return buffer.ToString();
 
 			// Convert the key to its virtual key code
 			var virtualKey = (uint)key;
 
 			// Map the virtual key to a scan code
-			var scanCode = Win32PInvoke.MapVirtualKey(virtualKey, 0);
+			var scanCode = PInvoke.MapVirtualKey(virtualKey, 0);
 
 			// Get the active keyboard layout
-			var keyboardLayout = Win32PInvoke.GetKeyboardLayout(0);
+			var keyboardLayout = PInvoke.GetKeyboardLayout(0);
 
 			if (Win32PInvoke.ToUnicodeEx(virtualKey, scanCode, state, buffer, buffer.Capacity, 0, keyboardLayout) > 0)
 				return buffer[^1].ToString();

src/Files.App/Helpers/Win32/Win32PInvoke.Methods.cs

@@ -223,23 +223,6 @@ public static extern int ToUnicodeEx(
 			IntPtr keyboardLayout
 		);
 
-		[DllImport("user32.dll")]
-		public static extern bool GetKeyboardState(
-			byte[] lpKeyState
-		);
-
-		[DllImport("user32.dll", CharSet = CharSet.Auto)]
-		public static extern IntPtr GetKeyboardLayout
-		(
-			uint idThread
-		);
-
-		[DllImport("user32.dll")]
-		public static extern uint MapVirtualKey(
-			uint code,
-			uint mapType
-		);
-
 		[DllImport("user32.dll")]
 		public static extern bool TranslateMessage(
 			ref MSG lpMsg