In order to use Sunflower Excel .Net in your application, you must first add a reference to it:
1.
In Solution Explorer (VisualStudio.Net) , expand the project node you want to add a reference to.
2.
Right-click the References node for the project and select Add Reference from the shortcut menu:

3.
Locate the component using the Browse button.
4.
The component you referenced appears in the SelectedComponents pane of the dialog box:

5. Click OK when you have added reference to the component.
1using System; 2 3namespace Project1 4{ 5 public class Class1 6 { 7 static void Main() 8 { 9 Console.Write("Converting XLS to HTML: "); 10 DuoDimension.Sunflower.Excel conv = new DuoDimension.Sunflower.Excel(""); 11 if (conv.IsExcelInstalled) 12 { 13 int ret = conv.XlsToHtml(@"d:\test.xls", @"d:\test.html"); 14 switch (ret) 15 { 16 case 0: Console.Write("...Ok."); break; 17 case 1: Console.Write("...error: can't open file."); break; 18 case 2: Console.Write("...error: can't save the destination file."); break; 19 } 20 } 21 } 22 } 23}
1Module Module1 2 Sub Main() 3 Console.Write("Converting XLS to HTML: ") 4 Dim conv As New DuoDimension.Sunflower.Excel("") 5 6 If conv.IsExcelInstalled = True Then 7 Dim ret = conv.XlsToHtml("d:\test.xls", "d:\test.html") 8 Select Case ret 9 Case 0 10 Console.Write("...Ok.") 11 Case 1 12 Console.Write("...error: can't open file.") 13 Case 2 14 Console.Write("...error: can't save the destination file.") 15 End Select 16 End If 17 End Sub 18End Module