This function is obsolete in Windows XP and later versions of the Windows operating system. Use RtlGetVersion instead.

PsGetVersion returns caller-selected information about the current version of the NT-based operating system.

BOOLEAN
  PsGetVersion(
    PULONG  MajorVersion  OPTIONAL,
    PULONG  MinorVersion  OPTIONAL,
    PULONG  BuildNumber  OPTIONAL,
    PUNICODE_STRING  CSDVersion  OPTIONAL
    );

Parameters

MajorVersion

Points to a caller-supplied variable that this routine sets to the major version of the operating system. This optional parameter can be NULL.

MinorVersion

Points to a caller-supplied variable that this routine sets to the minor version of the operating system. This optional parameter can be NULL.

BuildNumber

Points to a caller-supplied variable that this routine sets to the current build number of the operating system. This optional parameter can be NULL.

CSDVersion

Points to a caller-allocated buffer in which this routine returns the current service-pack version as a Unicode string only during system driver initialization. This optional parameter can be NULL.

Return Value

PsGetVersion returns whether the system is a checked or free build, as follows:

Comments

PsGetVersion returns the requested information, depending on which optional parameter(s) the caller supplies.

To retrieve the current service-pack number, it is easier and more efficient to make an application-level call within the Win32 environment than to call PsGetVersion during system driver initialization, which then must parse the string it returns at CSDVersion. When the registry is initialized, a driver cannot obtain this string from PsGetVersion, but must read the CmCSDVersionString value from the registry.

Requirements

IRQL: PASSIVE_LEVEL

Headers: Declared in Ntddk.h. Include Ntddk.h.