Optional
aInstancePtr: objectA run time mechanism for interface discovery.
NS_OK if the interface is supported by the associated instance, NS_NOINTERFACE if it is not.
aInstancePtr must not be null.
[in] A requested interface IID
[out] A pointer to an interface pointer to receive the result.
This method must be called before the menu is opened and displayed to the user. It allows the platform code to update the menu and also determine whether the menu should even be shown.
true if the menu can be shown, false if it should not be shown
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Platform-independent interface to platform native menu objects.