Introduction to Office Open XML Code Snippets

i can't see the screen cast...

Sorry but the audio level is very low, I can just about make out what's said if I have my volume really high but it's giving me a headache trying to listen!.

I have to create a Custom Connector like a Custom Shape in a PPTX using OOXml. As, bent connector or curve connector bent on 90 degree only, so like a custom shape i have to create a custom connector, because my connector can go through any path. I download the "OfficeOpenXML-DrawingMLGeometries.zip" where i found a definition of preset Shapes on the file "presetShapeDefinitions.xml" , in this file Bentconnector2 is defined by:

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<bentConnector2>
    <rect l="l" t="t" r="r" b="b" xmlns="http://schemas.openxmlformats.org/drawingml/2006/main" />
    <pathLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main">
      <path fill="none">
        <moveTo>
          <pt x="l" y="t" />
        </moveTo>
        <lnTo>
          <pt x="r" y="t" />
        </lnTo>
        <lnTo>
          <pt x="r" y="b" />
        </lnTo>
      </path>
    </pathLst>
  </bentConnector2> 
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That means bent connector2 is being drawn in this way. But, now i want to create a custom connector like above one. My slide1.xml contain a connection shape like....

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<p:cxnSp>
        <p:nvCxnSpPr/>    
        <p:spPr>
          <a:xfrm >
            <a:off x="3886200" y="2362200"/>
            <a:ext cx="914400" cy="914400"/>
          </a:xfrm>
          <a:custGeom >
                <rect l="l" t="t" r="r" b="b" xmlns="http://schemas.openxmlformats.org/drawingml/2006/main" />
                     <pathLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main">
                         <path fill="none">
                                <moveTo>
                                   <pt x="l" y="t" />
                              </moveTo>
                             <lnTo>
                                   <pt x="r" y="t" />
                          </lnTo>
                          <lnTo>
                                  <pt x="r" y="b" />
                         </lnTo>
                        </path>
                      </pathLst>
          </a:custGeom>
        </p:spPr>
        <p:style/>        
</p:cxnSp>
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Rather than....
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<p:cxnSp>
        <p:nvCxnSpPr/>    
        <p:spPr>
          <a:xfrm >
            <a:off x="3886200" y="2362200"/>
            <a:ext cx="914400" cy="914400"/>
          </a:xfrm>
          <a:prstGeom prst="bentConnector2">  // Generally We define in this way to create a Predefined Connector
            <a:avLst/>            
          </a:prstGeom>
        </p:spPr>
        <p:style/>        
</p:cxnSp>
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 But it gives always an error when open that pptx, It says pptx has been corrupted .....
 Plz, help me how i can fix this problem...??? If it is not possible for you to help me rgarding this metter, then Where should i go ? where i can get the actual cause, Plz mention me....

Thanks and Regards
Tamkin
SW ENG. (KAZ Software)
Bangladesh

it seems the link is missing?