-|[/ZW](../build/reference/zw-windows-runtime-compilation.md)<br /><br /> /ZW:nostdlib|Enables [!INCLUDE[wrt](../cppcx/includes/wrt-md.md)] language extensions.<br /><br /> The `nostdlib` parameter prevents the compiler from using the standard, predefined search path to find assembly and .winmd files.<br /><br /> The **/ZW** compiler option implicitly specifies the following compiler options:<br /><br /> - [/FI](../build/reference/fi-name-atlde.md) vccorlib.h, which forces inclusion of the vccorlib.h header file that defines many types that are required by the compiler.<br />- [/FU](../build/reference/fu-name-forced-hash-using-file.md) Windows.winmd, which forces inclusion of the Windows.winmd metadata file that's provided by the operating system and defines many types in the [!INCLUDE[wrt](../cppcx/includes/wrt-md.md)].<br />- **/FU** Platform.winmd, which forces inclusion of the Platform.winmd metadata file that's provided by the compiler and defines most types in the Platform family of namespaces.|
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