Enabled applications which require elevated privileges. (#2053)

Author: excitoon

supporting/shimexe/bin/checksum.sha256

@@ -1 +1 @@
-dbbbea318b9216dc9671cd3902cba625dabde7c202326566ad424b9520899248 *shim.exe
+cb440b8a08a2095a59666a859b35aa5a1524b140b909ecc760f38f3baccf80e6 *shim.exe

supporting/shimexe/bin/checksum.sha512

@@ -1 +1 @@
-287b250828e1925842d52326ed93c89fb9b2451750e6d20f0db2f0406bc1a5038598f2b7b4228c8ef764f61f7c654c4aa4aef39b8ae671d457ff974ad9e4727d *shim.exe
+710aeef5381f96ea0360a27ce6b792f67e018abb91d6dc67fc5c18c15baf611f36268a3f9e70a339b1a1b0e5dbfdaee10d74288352e609764d5b81303409a332 *shim.exe

supporting/shimexe/bin/shim.exe

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
@@ -18,6 +19,7 @@ static extern bool CreateProcess(string lpApplicationName,
             uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory,
             [In] ref STARTUPINFO lpStartupInfo,
             out PROCESS_INFORMATION lpProcessInformation);
+        const int ERROR_ELEVATION_REQUIRED = 740;
 
         [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
         struct STARTUPINFO {
@@ -97,7 +99,24 @@ static int Main(string[] args) {
                 lpStartupInfo: ref si,
                 lpProcessInformation: out pi)) {
 
-                return Marshal.GetLastWin32Error();
+                var error = Marshal.GetLastWin32Error();
+                if(error == ERROR_ELEVATION_REQUIRED) {
+                    // Unfortunately, ShellExecute() does not allow us to run program without
+                    // CREATE_NEW_CONSOLE, so we can not replace CreateProcess() completely.
+                    // The good news is we are okay with CREATE_NEW_CONSOLE when we run program with elevation.
+                    Process process = new Process();
+                    process.StartInfo = new ProcessStartInfo(path, cmd_args);
+                    process.StartInfo.UseShellExecute = true;
+                    try {
+                        process.Start();
+                    }
+                    catch(Win32Exception exception) {
+                        return exception.ErrorCode;
+                    }
+                    process.WaitForExit();
+                    return process.ExitCode;
+                }
+                return error;
             }
 
             WaitForSingleObject(pi.hProcess, INFINITE);