// Create a new workbook
intrusive_ptr<IWorkbook> workbook = Factory::CreateIWorkbook();

// Get first worksheet which is created by default
intrusive_ptr<IWorksheet> worksheet = workbook->GetIWorksheets()->GetObjectByIndex(0);

// Adding Equation shapes to the worksheet
worksheet->GetIShapes()->AddAutoIShape(AutoShapeType::AutoShapeType_MathPlus, 1, 0, 1, 0, 100, 100);
	
// Saving the excel file
workbook->Save(new String("resFile.xlsx"));