How do I look up the proper Windows System Error Code to use in my application?

Question

I am writing a C# .NET 2.0 application wherein when a message is expected to be received via the SerialPort. If the frame is not received (i.e. times out) or i

Answer 1

using System.Runtime.InteropServices;       // DllImport

public static string GetSystemMessage(int errorCode) {
int capacity = 512;
int FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000;
StringBuilder sb = new StringBuilder(capacity);
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, errorCode, 0,
    sb, sb.Capacity, IntPtr.Zero);
int i = sb.Length;
if (i>0 && sb[i - 1] == 10) i--;
if (i>0 && sb[i - 1] == 13) i--;
sb.Length = i;
return sb.ToString();
}

[DllImport("kernel32.dll")]
public static extern int FormatMessage(int dwFlags, IntPtr lpSource, int dwMessageId,
    int dwLanguageId, StringBuilder lpBuffer, int nSize, IntPtr Arguments);