Fix some Win32 API definitions

Author: YoshiRulz

src/BizHawk.Client.EmuHawk/CustomControls/FolderBrowserDialogEx.cs

@@ -67,7 +67,8 @@ int Callback(IntPtr hwnd, uint uMsg, IntPtr lParam, IntPtr lpData)
 					browseOptions &= ~BROWSEINFOW.FLAGS.NewDialogStyle;
 				}
 
-				pszDisplayName = Marshal.AllocCoTaskMem(Win32Imports.MAX_PATH * sizeof(char));
+				const int BUF_SIZE_BYTES = (int) Win32Imports.MAX_PATH * sizeof(char);
+				pszDisplayName = Marshal.AllocCoTaskMem(BUF_SIZE_BYTES);
 				var bi = new BROWSEINFOW
 				{
 					hwndOwner = hWndOwner,

src/BizHawk.Client.EmuHawk/EmuHawkUtil.cs

@@ -33,7 +33,7 @@ public static string ResolveShortcut(string filename)
 				((ShellLinkImports.IShellLinkW*)link)->Resolve(hwnd, 0);
 #endif
 
-				((ShellLinkImports.IShellLinkW*)link)->GetPath(out var path, Win32Imports.MAX_PATH + 1, 0);
+				((ShellLinkImports.IShellLinkW*) link)->GetPath(out var path, (int) Win32Imports.MAX_PATH + 1, 0);
 				return path;
 			}
 		}

src/BizHawk.Common/Win32/CWDHacks.cs

@@ -23,7 +23,7 @@ static Exception GetExceptionForFailure()
 				return new InvalidOperationException("GetCurrentDirectoryW returned 0!", ex);
 			}
 
-			const int STARTING_BUF_SIZE = Win32Imports.MAX_PATH + 1;
+			const int STARTING_BUF_SIZE = (int) Win32Imports.MAX_PATH + 1;
 			var startingBuffer = stackalloc char[STARTING_BUF_SIZE];
 			var ret = GetCurrentDirectoryW(STARTING_BUF_SIZE, startingBuffer);
 			switch (ret)

src/BizHawk.Common/Win32/Win32Imports.cs

@@ -14,30 +14,30 @@ namespace BizHawk.Common
 	/// </summary>
 	public static class Win32Imports
 	{
-		public const int MAX_PATH = 260;
+		public const uint MAX_PATH = 260U;
 
 		[Flags]
-		public enum TPM
+		public enum TPM : uint
 		{
 			LEFTBUTTON = 0x0000,
 			RIGHTBUTTON = 0x0002,
 			LEFTALIGN = 0x0000,
-			CENTERALIGN = 0x000,
-			RIGHTALIGN = 0x000,
+			CENTERALIGN = 0x0004,
+			RIGHTALIGN = 0x0008,
 			TOPALIGN = 0x0000,
 			VCENTERALIGN = 0x0010,
 			BOTTOMALIGN = 0x0020,
 			HORIZONTAL = 0x0000,
 			VERTICAL = 0x0040,
 			NONOTIFY = 0x0080,
 			RETURNCMD = 0x0100,
-			RECURSE = 0x0001,
+			RECURSE = 0x0001, // value missing from official docs, but confirmed by https://github.com/microsoft/windows-rs/blob/bb15076311bf185400ecd244d47596b8415450fa/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs#L3461
 			HORPOSANIMATION = 0x0400,
 			HORNEGANIMATION = 0x0800,
 			VERPOSANIMATION = 0x1000,
 			VERNEGANIMATION = 0x2000,
 			NOANIMATION = 0x4000,
-			LAYOUTRTL = 0x8000,
+			LAYOUTRTL = 0x8000, // value also missing from official docs, but confirmed by https://github.com/microsoft/windows-rs/blob/bb15076311bf185400ecd244d47596b8415450fa/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs#L3456
 		}
 
 		[DllImport("user32.dll", ExactSpelling = true)]
@@ -53,8 +53,8 @@ public enum TPM
 		[DllImport("kernel32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
 		public static extern unsafe int FormatMessageW(int flags, IntPtr source, uint messageId, uint languageId, char* outMsg, int size, IntPtr args);
 
-		[DllImport("kernel32.dll", ExactSpelling = true)]
-		public static extern uint GetLastError();
+		public static uint GetLastError()
+			=> unchecked((uint) Marshal.GetLastWin32Error());
 
 		[DllImport("shlwapi.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
 		public static extern bool PathRelativePathToW([Out] char[] pszPath, [In] string pszFrom, [In] FileAttributes dwAttrFrom, [In] string pszTo, [In] FileAttributes dwAttrTo);