QPlatformNativeInterface::nativeResourceForWidget error.

[Frameworks]

Hi,

How and where can I use 
QPlatformNativeInterface::nativeResourceForWidget("JavaVM",0) I tried like

/void * test;
test = QPlatformNativeInterface::nativeResourceForWidget("JavaVM",0);/

But I always get: /incomplete type 'QPlatformNativeInterface' used in 
nested name specifier/.

Thanks,
Carlos.
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