C# WIN10x64位 编译文件为32位程序时候 访问C盘报错

            var file = "C:\Windows\System32\osk.exe";

            Process.Start(file);

报错 找不到文件

使用 win32API  也打不开  可以打Calc.exe

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Web;
using System.Windows.Forms;

namespace WindowsForms打开exe
{
    static class Program
    {

        [DllImport("kernel32.dll")]
        public static extern bool CreateProcess(
            string lpApplicationName,
            string lpCommandLine,
            IntPtr lpProcessAttributes,
            IntPtr lpThreadAttributes,
                bool bInheritHandles,
                uint dwCreationFlags,
                IntPtr lpEnvironment,
                string lpCurrentDirectory,
                ref STARTUPINFO lpStartupInfo,
                out PROCESS_INFORMATION lpProcessInformation
            );

        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {

            var file = "C:\Windows\System32\osk.exe"; // Calc.exe


            STARTUPINFO si = new STARTUPINFO();

            PROCESS_INFORMATION pi = new PROCESS_INFORMATION();
            //可以打开
            CreateProcess("C:\WINDOWS\SYSTEM32\Calc.exe", null, IntPtr.Zero, IntPtr.Zero, false, 0, IntPtr.Zero, null, ref si, out pi);

            Console.ReadLine();



            //StartupNotepad();

            //string argm = "C:\Windows\System32\osk.exe";

            //STARTUPINFO sInfo = new STARTUPINFO();
            //PROCESS_INFORMATION pInfo = new PROCESS_INFORMATION();

            //if (!CreateProcess(null, new StringBuilder(argm), null, null, false, 0, null, null, ref sInfo, ref pInfo))
            //{
            //    throw new Exception("调用失败");
            //}
            //uint i = 0;
            //WaitForSingleObject(pInfo.hProcess, int.MaxValue);
            //GetExitCodeProcess(pInfo.hProcess, ref i);
            //CloseHandle(pInfo.hProcess);
            //CloseHandle(pInfo.hThread);

            //StartupNotepad();
            //dynamic file = "C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe";
            //file = "C:\Windows\System32\osk.exe";
            ////判断文件是否存在
            //if (System.IO.File.Exists(file))
            //{
            //    Process.Start(file);
            //}
        }
        #region Win32 Api : WaitForSingleObject
        //检测一个系统核心对象(线程，事件，信号)的信号状态，当对象执行时间超过dwMilliseconds就返回，否则就一直等待对象返回信号
        [DllImport("Kernel32.dll")]
        public static extern uint WaitForSingleObject(System.IntPtr hHandle, uint dwMilliseconds);

        #endregion

        #region Win32 Api : CloseHandle
        //关闭一个内核对象,释放对象占有的系统资源。其中包括文件、文件映射、进程、线程、安全和同步对象等
        [DllImport("Kernel32.dll")]
        public static extern bool CloseHandle(System.IntPtr hObject);

        #endregion       

        #region Win32 Api : GetExitCodeProcess
        //获取一个已中断进程的退出代码,非零表示成功，零表示失败。
        //参数hProcess，想获取退出代码的一个进程的句柄，参数lpExitCode，用于装载进程退出代码的一个长整数变量。
        [DllImport("Kernel32.dll")]
        static extern bool GetExitCodeProcess(System.IntPtr hProcess, ref uint lpExitCode);

        #endregion

        [DllImport("Kernel32.dll", CharSet = CharSet.Ansi)]
        public static extern bool CreateProcess(
         StringBuilder lpApplicationName, StringBuilder lpCommandLine,
         SECURITY_ATTRIBUTES lpProcessAttributes,
         SECURITY_ATTRIBUTES lpThreadAttributes,
         bool bInheritHandles,
         int dwCreationFlags,
         StringBuilder lpEnvironment,
         StringBuilder lpCurrentDirectory,
         ref STARTUPINFO lpStartupInfo,
         ref PROCESS_INFORMATION lpProcessInformation
         );




        //声明结构体
        [System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
        public class SECURITY_ATTRIBUTES
        {
            public int nLength;
            public string lpSecurityDescriptor;
            public bool bInheritHandle;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct PROCESS_INFORMATION
        {
            public IntPtr hProcess;
            public IntPtr hThread;
            public int dwProcessId;
            public int dwThreadId;
        }

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

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern bool CreateProcess(
   string lpApplicationName,
   string lpCommandLine,
   ref SECURITY_ATTRIBUTES lpProcessAttributes,
   ref SECURITY_ATTRIBUTES lpThreadAttributes,
   bool bInheritHandles,
   uint dwCreationFlags,
   IntPtr lpEnvironment,
   string lpCurrentDirectory,
   [In] ref STARTUPINFO lpStartupInfo,
   out PROCESS_INFORMATION lpProcessInformation);
        public static void StartupNotepad()
        {
            const uint NORMAL_PRIORITY_CLASS = 0x0020;

            bool retValue;
            string Application = Environment.GetEnvironmentVariable("windir") + @"Notepad.exe";
            string CommandLine = null;// @" c:oot.ini";
            PROCESS_INFORMATION pInfo = new PROCESS_INFORMATION();
            STARTUPINFO sInfo = new STARTUPINFO();
            SECURITY_ATTRIBUTES pSec = new SECURITY_ATTRIBUTES();
            SECURITY_ATTRIBUTES tSec = new SECURITY_ATTRIBUTES();
            pSec.nLength = Marshal.SizeOf(pSec);
            tSec.nLength = Marshal.SizeOf(tSec);

            //Open Notepad
            retValue = CreateProcess(
                Application,
                CommandLine,
            ref pSec,
            ref tSec,
            false,
            NORMAL_PRIORITY_CLASS,
            IntPtr.Zero, null, ref sInfo, out pInfo);

            //Console.WriteLine("Process ID (PID): " + pInfo.dwProcessId);
            //Console.WriteLine("Process Handle : " + pInfo.hProcess);
        }

    }
}