This function is obsolete in Windows XP and later versions of the operating system. Use RtlGetVersion instead.
PsGetVersion returns caller-selected information about the current version of the NT-based operating system.
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:
Value Meaning
TRUE (1) Checked build of the operating system.
FALSE (0) Free build of the operating system.
Headers
Declared in ntddk.h. Include ntddk.h.
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.
Callers of PsGetVersion must be running at IRQL = PASSIVE_LEVEL.
