Store Macro through C#

I wanted to write a macro and run it from C#. The
following is the code.

Microsoft.Vbe.Interop.VBProject vbp = new Microsoft.Vbe.Interop.VBProject();
Microsoft.Vbe.Interop.VBComponent vbc = vbp.VBComponents.Add(Microsoft.Vbe.Interop.vbext_ComponentType.vbext_ct_StdModule);

StringBuilder sb = new StringBuilder();
sb.Append("Sub FormatSheet()" + "\n");
sb.Append(" Selection.Find.Text= 'A-Gen'" + "\n");
sb.Append(" Selection.Find.Execute(ref fndtext, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing)" + "\n");
sb.Append(" Selection.Range.Paragraphs.OutlineLevel = Microsoft.Office.Interop.Word.WdOutlineLevel.wdOutlineLevel1");
sb.Append("End Sub");

string sCode = sb.ToString();
vbc.CodeModule.AddFromString(sCode);


But it shows the error as
{"Retrieving the COM class factory for component with CLSID {0002E169-0000-0000-C000-000000000046} failed due to the following error: 80040154."}


Thanks in advance for any help!