Windows NT native API reference

[Nytro]

Windows NT native API reference

Exemplu:

ZwQuerySystemInformation queries information about the system.

NTSYSAPI

NTSTATUS

NTAPI

ZwQuerySystemInformation(

IN SYSTEM_INFORMATION_CLASS SystemInformationClass,

IN OUT PVOID SystemInformation,

IN ULONG SystemInformationLength,

OUT PULONG ReturnLength OPTIONAL

);

Parameters

SystemInformationClass

The type of system information to be queried.The permitted values are a subset of

the enumeration SYSTEM_INFORMATION_CLASS, described in the following section.

SystemInformation

Points to a caller-allocated buffer or variable that receives the requested system

information.

SystemInformationLength

The size in bytes of SystemInformation, which the caller should set according to the

given SystemInformationClass.

ReturnLength

Optionally points to a variable that receives the number of bytes actually returned to

SystemInformation; if SystemInformationLength is too small to contain the available

information, the variable is normally set to zero except for two information classes

(6 and 11) when it is set to the number of bytes required for the available information.

If this information is not needed, ReturnLength may be a null pointer.

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