Debugging - Windows Explorer Thumbnail Handler Windows 8.1 -


windows explorer thumbnail handler

once again i'm @ mercy of outside world because microsofts documentation lacking or not date, or total bs.

using vs2010 i've created thumbnail handler (as atl) project. i've changed project compiles x64 because i'm developing on windows 8.1 64 bit computer.

after build register dll via regsvr in \windows\system32 folder, message states registration ok. using shellexview can see dll install , registered.

now comes question seems know nothing has worked me how debug code. i've said added nothing original code i've placed break points @ every function can file. see no other extension registered plt extension.

i set debug app c:\windows\explorer.exe c:\somefolder\ contains *.plt files. in debug output window never see dll loaded, of course no break points should hit.

i've tried executing vs2010 admin , not admin, i've tried killing explorers before starting debugging 1 , nothing.

so whats secret?

thanks in advance

thumbnail handlers loaded thumbnail handler extraction host because of security reason. if want handler loaded explorer directly must create additional registry dword value:

hkey_classes_root\clsid\{guid}\disableprocessisolation = 1

where {guid} clsid of handler.


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