title: COMException (0x80040154): Class not registered when using AxAcroPDFLib
body: <p>I am getting following error when using AxAcroPDF  </p>
  
  <p>System.Runtime.InteropServices.COMException (0x80040154): Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))  </p>
  
  <p>The line which throws error is </p>
  
  <pre><code>((System.ComponentModel.ISupportInitialize)(this.axAcroPDF1)).EndInit();
  </code></pre>
  
  <p>If anyone knows the solution please help</p>