diff --git a/ExcelSheetsToCSV/ExcelSheetsToCSV.csproj b/ExcelSheetsToCSV/ExcelSheetsToCSV.csproj
index 2154d22..7e0ecdf 100755
--- a/ExcelSheetsToCSV/ExcelSheetsToCSV.csproj
+++ b/ExcelSheetsToCSV/ExcelSheetsToCSV.csproj
@@ -9,7 +9,7 @@
     <OutputType>Exe</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ExcelSheetsToCSV</RootNamespace>
-    <AssemblyName>ExcelSheetsToCSV</AssemblyName>
+    <AssemblyName>exceltocsv</AssemblyName>
     <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <TargetFrameworkProfile>Client</TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
@@ -46,6 +46,7 @@
     <Compile Include="Helper.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="..\ndesk-options-0.2.1\src\NDesk.Options\NDesk.Options\Options.cs" />
   </ItemGroup>
   <ItemGroup>
     <COMReference Include="Microsoft.Office.Core">
@@ -76,6 +77,9 @@
       <EmbedInteropTypes>True</EmbedInteropTypes>
     </COMReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/ExcelSheetsToCSV/Program.cs b/ExcelSheetsToCSV/Program.cs
index 4cde4c7..ee37115 100755
--- a/ExcelSheetsToCSV/Program.cs
+++ b/ExcelSheetsToCSV/Program.cs
@@ -7,6 +7,7 @@
 using System.Runtime.InteropServices;
 using System.Diagnostics;
 using System.ComponentModel;
+using NDesk.Options;
 
 namespace ExcelSheetsToCSV
 {
@@ -14,17 +15,70 @@ class Program
     {
         static int Main(string[] args)
         {
-            if (args.Length != 1)
+            // the options to be set via command-line
+            bool help = false;
+            string outputType = "csv";
+            XlFileFormat format = XlFileFormat.xlCSVWindows;
+
+            // the command-line options
+            var p = new OptionSet()
+            {
+                { "t|type=", v => outputType = v},
+                { "h|help", v => help = v  != null},
+            };
+
+            // the parse commandline options and get any arguments
+            List<string> files = p.Parse(args);
+
+            switch (outputType.ToLower())
+            {
+                case "csv":
+                    format = XlFileFormat.xlCSVWindows;
+                    break;
+                case "tab":
+                    format = XlFileFormat.xlTextWindows;
+                    break;
+                default:
+                    if (!Enum.TryParse(outputType, out format))
+                    {
+                        Console.WriteLine("I did not recognize the output format you specified. Try again.");
+                        return 0;
+                    }
+                    break;
+            }
+
+
+            // User need help or omitted required argument?
+            if (help || files.Count <= 0)
             {
                 Console.WriteLine("Excel Sheets to CSV Converter");
                 Console.WriteLine();
                 Console.WriteLine("Usage:");
-                Console.WriteLine("\texcelsheetstocsv.exe <excel-file>");
+                Console.WriteLine("\texcelsheetstocsv.exe --help | ([--type=csv|tab]  <excel-file> [<excel-file> ...])");
                 return 0;
             }
 
-            string excelFile = new FileInfo(args[0]).FullName;
+            // Transform each file
+            foreach (var file in files)
+            {
+                var fi = new FileInfo(file);
+                if (fi.Exists)
+                {
+                    TransformSpreadSheet(fi.FullName, format);
+                }
+                else
+                {
+                    Console.Error.WriteLine("An input file you specified, '{0}', does not exist", fi.Name);
+                }
+            }
+            
+
+            // done!
+            return 0;
+        }
 
+        static void TransformSpreadSheet(string excelFile, XlFileFormat format)
+        {
             Console.WriteLine("Reading {0}...", excelFile);
 
             Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
@@ -48,14 +102,12 @@ static int Main(string[] args)
 
                     File.Delete(csvFileName);
                 }
-                sheet.SaveAs(csvFileName, XlFileFormat.xlCSVWindows);
+                sheet.SaveAs(csvFileName, format);
             }
 
             int hwnd = xlApp.Application.Hwnd;
             xlApp.Quit();
             Helper.TryKillProcessByMainWindowHwnd(hwnd);
-
-            return 0;
         }
 
     }
diff --git a/ExcelSheetsToCSV/app.config b/ExcelSheetsToCSV/app.config
new file mode 100755
index 0000000..f76deb9
--- /dev/null
+++ b/ExcelSheetsToCSV/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client"/></startup></configuration>