c# - DllNotFoundException when web application p/invokes a win32 DLL -

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i error when web application p/invokes win32 dll (player.dll)

system.dllnotfoundexception: unable load dll 'player.dll': specified module not found. (exception hresult: 0x8007007e)

at player.playerproxy.initialize()
atrunaware.wpfbrowserapp.player.page1.playfile(object sender, routedeventargs e)

the application written in wpf (xbap).

i've following info in .manifest file. although .net dlls mentioned in <dependency> tags, win32 dll mentioned in tag. why difference?

 <file name="win32dll\player.dll" size="620544">     <hash>       <dsig:transforms>         <dsig:transform algorithm="urn:schemas-microsoft-com:hashtransforms.identity" />       </dsig:transforms>       <dsig:digestmethod algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />       <dsig:digestvalue>ewahnz1qpeygmncxuskji4zta78=</dsig:digestvalue>     </hash>   </file>


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