title: How can I insert formula with relative cell references using ExcelDNA?
body: <p>I am looking to write a formula such as "=SUM(A1, B1)" to a cell using ExcelDNA. </p>
  
  <p>I am currently able to output it with absolute references in the form "=SUM(R1C1, R1C2)" which results in the formula being output as "=SUM($A$1,$B$1)":</p>
  
  <pre><code>XlCall.Excel(XlCall.xlcFormula, "=SUM(R1C1,R1C2)");
  </code></pre>
  
  <p>When I try this call using relative references:</p>
  
  <pre><code>XlCall.Excel(XlCall.xlcFormula, "=SUM(A1,B1)");
  </code></pre>
  
  <p>Excel reports a problem was found with the formula when it is called.</p>
  
  <p>Is it possible to have this output as a relative reference "=SUM(A1, B1)"?</p>