首先的一步就是使用tlbimp这个工具将excel9.0的对象库文件excel8.olb转换成为dll，这样才能做为.net平台assembly来使用：）操作如下：

tlbimp Excel9.olb Excel.dll

只要有了这个excel.dll，现在我们就能使用excel的各种操作函数了。
下面就让我们具体看看C#是如何使用这些东东吧。

1. 创建一个新Excel的Application:

application exc = new Application();
if (exc == null) {
Console.WriteLine("ERROR: EXCEL couldn"t be started");
return 0;
}

2. 让这个工程可见:

exc.set_visible(0, true);

3. 获取WorkBooks集合:

workbooks workbooks = exc.Workbooks;

4. 加入新的WorkBook:

_workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet, 0);

5. 获取WorkSheets集合:

_worksheet worksheet = (_Worksheet) sheets.get_Item(1);
if (worksheet == null) {
Console.WriteLine ("ERROR in worksheet == null");
}

6. 给单元格设置变量：

range range1 = worksheet.get_Range("C1", Missing.Value);
if (range1 == null) {
Console.WriteLine ("ERROR: range == null");
}
const int nCells = 1;
Object[] args1 = new Object[1];
args1[0] = nCells;
range1.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, range1, args1);

例程:

using System;
using System.Reflection;
using System.Runtime.InteropServices;
using Excel;

class Excel {
public static int Main() {
Application exc = new Application();
if (exc == null) {
Console.WriteLine("ERROR: EXCEL couldn"t be started!");
return 0;
}

exc.set_visible(0, true);
Workbooks workbooks = exc.Workbooks;
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet, 0);
Sheets sheets = workbook.Worksheets;

_worksheet worksheet = (_Worksheet) sheets.get_Item(1);
if (worksheet == null) {
Console.WriteLine ("ERROR: worksheet == null");
}

range range1 = worksheet.get_Range("C1", Missing.Value);
if (range1 == null) {
Console.WriteLine ("ERROR: range == null");
}
const int nCells = 1;
Object[] args1 = new Object[1];
args1[0] = nCells;
range1.GetType().InvokeMember("Value", BindingFlags.SetProperty, null,range1, args1);
return 100;
}
}

现在我们来看看如何使用数组，他有些类似于设置单元格。仅仅需要的改变只是args2[0] = array2;
const int nCell = 5;
Range range2 = worksheet.get_Range("A1", "E1");
int[] array2 = new int [nCell];
for (int i=0; i < array2.GetLength(0); i++) {
array2[i] = i+1;
}
Object[] args2 = new Object[1];
args2[0] = array2;
range2.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, range2, args2);

　　大家需要了解Tlbimp这个工具的使用啊：）这个东东很有用，可以将普通Win32程序移植到.Net下面来：）