如果某些参数只是 int 类型，则 ShellExecute 不起作用

我有以下代码，用于启动任何.exe（在本例中为记事本.exe）。但是此代码不起作用。虽然没有编译问题。

    [DllImport("shell32.dll", CharSet = CharSet.Auto)]
    static extern bool ShellExecuteEx(ref SHELLEXECUTEINFO lpExecInfo);
    public static void exev()
    {
        SHELLEXECUTEINFO info = new SHELLEXECUTEINFO();
        info.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(info);
        info.lpVerb = "open";
        info.lpFile = "c:''windows''notepad.exe";
        info.nShow = 5;
        info.fMask = 0x440;
        info.hwnd = IntPtr.Zero;
        ShellExecuteEx(ref info);
    }
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct SHELLEXECUTEINFO
{
    public int cbSize;
    public uint fMask;
    public IntPtr hwnd;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpVerb;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpFile;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpParameters;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpDirectory;
    public int nShow;
    public int hInstApp;
    public int lpIDList;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpClass;
    public int hkeyClass;
    public uint dwHotKey;
    public int hIcon;
    public int hProcess;
}

我尝试了下面的代码，其中我更改了 SHELLEXECUTEINFO 结构，然后它开始工作。我所做的更改将变量hInstApp，lpIDList，hkeyClass，hIcon和hProcess从int重命名为inptr。

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct SHELLEXECUTEINFO
{
    public int cbSize;
    public uint fMask;
    public IntPtr hwnd;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpVerb;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpFile;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpParameters;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpDirectory;
    public int nShow;
    public IntPtr hInstApp;
    public IntPtr lpIDList;
    [MarshalAs(UnmanagedType.LPTStr)]
    public string lpClass;
    public IntPtr hkeyClass;
    public uint dwHotKey;
    public IntPtr hIcon;
    public IntPtr hProcess;
}

我想知道我们是否可以让它仅适用于这些变量的 int 数据类型。还是它仅适用于 IntPtr？除了数据类型大小之外，它们在此方案中有何不同？因为当我只对hInstApp，lpIDList，hkeyClass，hIcon和hProcess变量使用int时，它不会给我任何语法错误，但它不起作用。