Createprocessasuser unhandled exception

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.NET

service

API

Hi,

I had popup a UI using win32 api creaprocessasuser. It works as I use admin user login. but it give two exception
1. unhandled exception (in event handler)as a normal user try to launch pop UI.

Description: The process was terminated due to an unhandled exception.
Exception Info: System.ObjectDisposedException
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Form.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at System.Windows.Forms.ContainerControl.FocusActiveControlInternal()
at System.Windows.Forms.Form.SetVisibleCore(Boolean)
at System.Windows.Forms.Control.set_Visible(Boolean)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application.Run(System.Windows.Forms.Form)
at WinFormPrintDriverApp.Program.Main(System.String[])


Faulting application name: myapplication.exe, version: 1.0.0.0, time stamp: 0xab4b49da
Faulting module name: KERNELBASE.dll, version: 6.3.9600.19671, time stamp: 0x5e67335c
Exception code: 0xe0434352
Fault offset: 0x00013d28
Faulting process id: 0x1d84
Faulting application start time: 0x01d77a36c724e6f6
Faulting application path: c:\testpath\myapplication.exe
Faulting module path: C:\Windows\SYSTEM32\KERNELBASE.dll
Report Id: 0ae714c2-e62a-11eb-8106-0050568ffd89
Faulting package full name:
Faulting package-relative application ID:


what might be issue? Any help appreciated to resolve this issue.

What I have tried:

my code:

  1  public static bool StartProcessAsCurrentUser(string appPath, string cmdLine, string currentUserName, string workDir = null, bool visible = true)
  2  {
  3      var hUserToken = IntPtr.Zero;
  4      var startInfo = new STARTUPINFO();
  5      var procInfo = new PROCESS_INFORMATION();
  6      var pEnv = IntPtr.Zero;
  7      int iResultOfCreateProcessAsUser;
  8  
  9      startInfo.cb = Marshal.SizeOf(typeof(STARTUPINFO));
 10        
 11      try
 12      {
 13          if (!GetSessionUserToken(ref hUserToken, currentUserName))
 14          {
 15              throw new Exception("StartProcessAsCurrentUser: GetSessionUserToken failed.");
 16          }
 17          uint dwCreationFlags = CREATE_UNICODE_ENVIRONMENT | (uint)(visible ? CREATE_NEW_CONSOLE : CREATE_NO_WINDOW);
 18          startInfo.wShowWindow = (short)(visible ? SW.SW_SHOW : SW.SW_HIDE);
 19          startInfo.lpDesktop = "winsta0\\default";
 20              
 21          if (!CreateEnvironmentBlock(ref pEnv, hUserToken, false))
 22          {
 23              throw new Exception("StartProcessAsCurrentUser: CreateEnvironmentBlock failed.");
 24          }
 25              
 26          if (!CreateProcessAsUser(hUserToken,
 27               appPath, // Application Name
 28               cmdLine, // Command Line
 29               IntPtr.Zero,
 30               IntPtr.Zero,
 31               false,
 32               dwCreationFlags,
 33               pEnv,
 34               workDir, // Working directory
 35               ref startInfo,
 36               out procInfo))
 37          {
 38              iResultOfCreateProcessAsUser = Marshal.GetLastWin32Error();
 39              throw new Exception("StartProcessAsCurrentUser: CreateProcessAsUser failed.  Error Code -" + iResultOfCreateProcessAsUser);
 40          }
 41          iResultOfCreateProcessAsUser = Marshal.GetLastWin32Error();
 42      }
 43      catch(Exception ex)
 44      { 
 45          log.Info("StartProcessAsCurrentUser exeption msg:"+ex.Message +" stacktrace:"+ex.StackTrace); 
 46      }
 47      finally
 48      {
 49          CloseHandle(hUserToken);
 50          if (pEnv != IntPtr.Zero)
 51          {
 52              DestroyEnvironmentBlock(pEnv);
 53          }
 54          CloseHandle(procInfo.hThread);
 55          CloseHandle(procInfo.hProcess);
 56      }
 57      return true;
 58  }
 59  }
 60  
 61  private static bool GetSessionUserToken(ref IntPtr phUserToken, string currentUserName)
 62  {
 63      var bResult = false;
 64      var hImpersonationToken = IntPtr.Zero;
 65      var activeSessionId = INVALID_SESSION_ID;
 66      try
 67      {
 68          ITerminalServicesManager manager = new TerminalServicesManager();
 69          using (ITerminalServer server = manager.GetLocalServer())
 70          {
 71              server.Open();
 72              foreach (ITerminalServicesSession session in server.GetSessions())
 73              {
 74                  if (session.UserName.ToUpper() == currentUserName.ToUpper())
 75                  {
 76                      activeSessionId = (uint)session.SessionId;
 77                      break;
 78                  }
 79              }
 80          }
 81  
 82          // If enumerating did not work, fall back to the old method
 83          if (activeSessionId == INVALID_SESSION_ID)
 84          {
 85              activeSessionId = WTSGetActiveConsoleSessionId();
 86          }
 87          log.Info("Method GetSessionUserToken:  activeSessionId:" + activeSessionId);
 88          if (WTSQueryUserToken(activeSessionId, ref hImpersonationToken) != 0)
 89          {
 90              // Convert the impersonation token to a primary token
 91              bResult = DuplicateTokenEx(hImpersonationToken, 0, IntPtr.Zero,
 92                  (int)SECURITY_IMPERSONATION_LEVEL.SecurityImpersonation, (int)TOKEN_TYPE.TokenPrimary, ref phUserToken);
 93              CloseHandle(hImpersonationToken);
 94          }
 95          log.Info("GetSessionUserToken ends.");
 96      }
 97      catch(Exception ex)
 98      {
 99          log.Info("GetSessionUserToken exception:." + ex.Message);
100      }
101      
102      return bResult;
103  }