Adding buttons to spreadsheets in .NET (VSTO)

Question

Using VSTO or some related technology, is it possible to programmatically embed a button in a cell of an Excel worksheet, and configure it to call a C# function when it is click

Answer 1

Here is the code which works for me in VSTO Add-in (modified version of Mathias's answer):

using Excel = Microsoft.Office.Interop.Excel;
using ExcelTools = Microsoft.Office.Tools.Excel;

public void AddButtonToWorksheet()
{
  Excel.Worksheet worksheet = (Excel.Worksheet)Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet;
  ExcelTools.Worksheet vstoSheet = Globals.Factory.GetVstoObject(worksheet);

  Button button = new Button();
  button.Text = "Dynamic Button!";
  vstoSheet.Controls.AddControl(
    button, 50, 50, 100, 50, "TestButton");
}