C# Signature:

[DllImport("kernel32.dll",EntryPoint="GetStartupInfoW")]
static extern void GetStartupInfo(out STARTUPINFO lpStartupInfo);

VB Signature:

Declare Sub GetStartupInfo Lib "kernel32.dll" (<Out> ByRef _
   lpStartupInfo As STARTUPINFO)

User-Defined Types:

STARTUPINFO

Notes:

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

Tips & Tricks:

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.

Sample Code:

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public struct STARTUPINFO
     {
      public uint cb;
      public string lpReserved;
      public string lpDesktop;
      public string lpTitle;
      public uint dwX;
      public uint dwY;
      public uint dwXSize;
      public uint dwYSize;
      public uint dwXCountChars;
      public uint dwYCountChars;
      public uint dwFillAttribute;
      public uint dwFlags;
      public ushort wShowWindow;
      public ushort cbReserved2;
      public IntPtr lpReserved2;
      public IntPtr hStdInput;
      public IntPtr hStdOutput;
      public IntPtr hStdError;
     }

     [DllImport("kernel32.dll", SetLastError = true, EntryPoint = "GetStartupInfoA")]
     public static extern void GetStartupInfo(out STARTUPINFO lpStartupInfo);

Alternative Managed API:

Do you know one? Please contribute it!