ref STARTUPINFO lpStartupInfo,

    ByRef lpStartupInfo As STARTUPINFO, _

                           <[In]()> ByRef lpStartupInfo As StartupInfo, _

STARTUPINFO

STARTUPINFO si;

Dim si As STARTUPINFO

     ref  StartupInfo       startupInfo,

    Public Function CreateProcessWithLogonW(ByVal userName As String, ByVal domain As String, ByVal password As String, ByVal logonFlags As UInt32, ByVal applicationName As String, ByVal commandLine As String, ByVal creationFlags As UInt32, ByVal environment As UInt32, ByVal currentDirectory As String, ByRef startupInfo As StartupInfo, ByRef processInformation As ProcessInformation) As Boolean

    Public Structure StartupInfo

    End Structure 'StartupInfo

    Public Function CreateProcessWithLogonW(ByVal userName As String, ByVal domain As String, ByVal password As String, ByVal logonFlags As UInt32, ByVal applicationName As String, ByVal commandLine As String, ByVal creationFlags As UInt32, ByVal environment As UInt32, ByVal currentDirectory As String, ByRef startupInfo As StartupInfo, ByRef processInformation As ProcessInformation) As Boolean

    Dim startupInfo As New StartupInfo

    startupInfo.reserved = Nothing

    startupInfo.flags = startupInfo.flags And Startf_UseStdHandles

    startupInfo.stdOutput = MyPointer  

    startupInfo.stdError = MyErrorPointer    

        currentDirectory, startupInfo, processInfo)

STARTUPINFO, PROCESS_INFORMATION

        public struct StartupInfo

            ref   StartupInfo startupInfo,

            StartupInfo startupInfo = new StartupInfo();

            startupInfo.reserved = null;

            startupInfo.flags &= Startf_UseStdHandles;

            startupInfo.stdOutput = (IntPtr)StdOutputHandle;

            startupInfo.stdError = (IntPtr)StdErrorHandle;

                    ref startupInfo,

        EXTENDED_STARTUPINFO_PRESENT = 0x00080000,

        EXTENDED_STARTUPINFO_PRESENT    = 0x00080000,

    EXTENDED_STARTUPINFO_PRESENT = &H80000

    IntPtr lpStartupInfo,

public struct StartupInfo

StartupInfo si; // no new required since StartupInfo is a value type (struct) - StartupInfo not supported by the .NET Compact Framework

public static extern bool CreateProcessWithTokenW(IntPtr hToken, LogonFlags dwLogonFlags, string lpApplicationName, string lpCommandLine, CreationFlags dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, [In] ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);

    Public Shared Function CreateProcessWithTokenW(hToken As IntPtr, dwLogonFlags As Integer, lpApplicationName As String, lpCommandLine As String, dwCreationFlags As Integer, lpEnvironment As IntPtr, lpCurrentDirectory As IntPtr, ByRef lpStartupInfo As STARTUPINFO, ByRef lpProcessInformation As PROCESS_INFORMATION) As Boolean

public struct STARTUPINFOEX

     public STARTUPINFO StartupInfo;

Structure STARTUPINFOEX

        startupInfoEx.StartupInfo.cb = Marshal.SizeOf(startupInfoEx);

public struct STARTUPINFOEX

     public STARTUPINFO StartupInfo;

Structure STARTUPINFOEX

        startupInfoEx.StartupInfo.cb = Marshal.SizeOf(startupInfoEx);

   [In] ref STARTUPINFO lpStartupInfo,

    <[In]> ByRef lpStartupInfo As STARTUPINFO, _

STARTUPINFO, PROCESS_INFORMATION, SECURITY_ATTRIBUTES, STARTUPINFOEX

Replace STARTUPINFO with STARTUPINFOEX to use UpdateProcThreadAttribute and extend CreateProcess. Make sure you include the flag EXTENDED_STARTUPINFO_PRESENT (0x00080000)

     STARTUPINFO sInfo = new STARTUPINFO();

     Dim sInfo As STARTUPINFO = New STARTUPINFO()

[DllImport("kernel32.dll",EntryPoint="GetStartupInfoW")]

static extern void GetStartupInfo(out STARTUPINFO lpStartupInfo);

Declare Sub GetStartupInfo Lib "kernel32.dll" (<Out> ByRef _

   lpStartupInfo As STARTUPINFO)

STARTUPINFO

Because .NET is in Unicode, one needs to call the wide character version of this call GetStartupInfoW.

On my W10x64 my vshost.exe died by caling the GetStartupInfoW method.

So i changed it to GetStartupInfoA and also changed the 'STARTUPINFO's StructureLayout-Attribute to CharSet.Ansi instead of Unicode.

    public struct STARTUPINFO

     [DllImport("kernel32.dll", SetLastError = true, EntryPoint = "GetStartupInfoA")]

     public static extern void GetStartupInfo(out STARTUPINFO lpStartupInfo);

Save the attribute list to the STARTUPINFOEX struct, use UpdateProcThreadAttribute to fill in the now-reserved attribute entries.

        flags = flags | EXTENDED_STARTUPINFO_PRESENT;

        startupInfoEx.lpAttributeList = InitializeProcThreadAttributeList(attributeCount);

    and [STARTUPINFOEX]

Call InitializeProcThreadAttributeList before adding attributes. Save the result to a STARTUPINFOEX struct.

private static void SetNewProcessParent(ref STARTUPINFOEX startupInfoEx, int parentProcessId)

        startupInfoEx.lpAttributeList,

    private static void SetInheritableHandles(ref STARTUPINFOEX startupInfoEx, ICollection<IntPtr> inheritableHandles)

        startupInfoEx.lpAttributeList,

    /// STARTUPINFO structure passed to the CreateProcess function by the

    ''' STARTUPINFO structure passed to the CreateProcess function by the