import CreateDirectory and FormatMessage : Windows API « Windows « C# / C Sharp

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C# / C Sharp » Windows » Windows APIScreenshots 
import CreateDirectory and FormatMessage
 

using System;
using System.Text;
using System.Runtime.InteropServices;

public class Starter {
    public static void Main() {
        bool resp = API.CreateDirectory(@"c*:\file.txt", IntPtr.Zero);
        if (resp == false) {
            StringBuilder message;
            int errorcode = Marshal.GetLastWin32Error();
            API.FormatMessage(API.FORMAT_MESSAGE_ALLOCATE_BUFFER | API.FORMAT_MESSAGE_FROM_SYSTEM | API.FORMAT_MESSAGE_IGNORE_INSERTS,IntPtr.Zero, errorcode,0, out message, 0, IntPtr.Zero);
            Console.WriteLine(message);
        }
    }
}

public class API {
    [DllImport("kernel32.dll", SetLastError = true)]
    public static extern bool CreateDirectory(string lpPathName, IntPtr lpSecurityAttributes);

    [DllImport("kernel32.dll", SetLastError = false)]
    public static extern System.Int32 FormatMessage(
        System.Int32 dwFlags,
        IntPtr lpSource,
        System.Int32 dwMessageId,
        System.Int32 dwLanguageId,
        out StringBuilder lpBuffer,
        System.Int32 nSize,
        IntPtr va_list);

    public const int FORMAT_MESSAGE_ALLOCATE_BUFFER = 256;
    public const int FORMAT_MESSAGE_IGNORE_INSERTS = 512;
    public const int FORMAT_MESSAGE_FROM_STRING = 1024;
    public const int FORMAT_MESSAGE_FROM_HMODULE = 2048;
    public const int FORMAT_MESSAGE_FROM_SYSTEM = 4096;
    public const int FORMAT_MESSAGE_ARGUMENT_ARRAY = 8192;
    public const int FORMAT_MESSAGE_MAX_WIDTH_MASK = 255;
}

 
Related examples in the same category
1. DLL: GetVersionEx
2. Keyboard timer: GetTickCountKeyboard timer: GetTickCount
3. BitBlt
4. Get the Total Free Space on a Drive by using kernel32.dll
5. imports three functions to display the vertical and horizontal size of the screen.
6. MessageBox from user32.dll
7. Get OS Version from kernel32.dll
8. imports the printf function
9. marshals string for unmanaged memory as ANSI.
10. imports the GetModuleHandleW function specifically
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