OSVERSIONINFO

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winbase.h
Unicode
WinNT
Platform Notes
None

The OSVERSIONINFO data structure contains operating system version information. The information includes major and minor version numbers, a build number, a platform identifier, and descriptive text about the operating system. This structure is used with the GetVersionEx function.

typedef struct _OSVERSIONINFO{

DWORD dwOSVersionInfoSize;

DWORD dwMajorVersion;

DWORD dwMinorVersion;

DWORD dwBuildNumber;

DWORD dwPlatformId;

TCHAR szCSDVersion[ 128 ];

} OSVERSIONINFO;

Members
dwOSVersionInfoSize
Specifies the size, in bytes, of this data structure. Set this member to sizeof(OSVERSIONINFO) before calling the GetVersionEx function.

dwMajorVersion
Identifies the major version number of the operating system. For example, for Windows NT version 3.51, the major version number is 3; and for Windows NT version 4.0, the major version number is 4.

dwMinorVersion
Identifies the minor version number of the operating system. For example, for Windows NT version 3.51, the minor version number is 51; and for Windows NT version 4.0, the minor version number is 0.

dwBuildNumber
Windows NT: Identifies the build number of the operating system.

Windows 95: Identifies the build number of the operating system in the low-order word. The high-order word contains the major and minor version numbers.

dwPlatformId
Identifies the operating system platform. This member can be one of the following values:

Value	Platform
VER_PLATFORM_WIN32s	Win32s on Windows 3.1.
VER_PLATFORM_WIN32_WINDOWS	Win32 on Windows 95.
VER_PLATFORM_WIN32_NT	Win32 on Windows NT.

szCSDVersion
Windows NT: Contains a null-terminated string, such as "Service Pack 3", that indicates the latest Service Pack installed on the system. If no Service Pack has been installed, the string is empty.

Windows 95: Contains a null-terminated string that provides arbitrary additional information about the operating system.