Which OS is which? (VC++, C++) programmers...?

Do you know any command (method or any sort of commands) in Visual C++ that is used to determine which operating system is running?


For an example, if your machine is running in XP Operating System, this code will give a result that the OS used by the machine is XP..





Please help... and Thanks in advance





RedScar

Which OS is which? (VC++, C++) programmers...?
VC++ v6.0 Help


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_osver, _winmajor, _winminor, _winver


These variables store build and version numbers of the 32-bit Windows operating systems. Declarations for these variables in STDLIB.H are as follows:





extern unsigned int _osver;


extern unsigned int _winmajor;


extern unsigned int _winminor;


extern unsigned int _winver;





These variables are useful in programs that run in different versions of Windows NT or Windows 95.





Variable Description


_osver //Current build number


_winmajor //Major version number


_winminor //Minor version number


_winver //Holds value of _winmajor in high byte and value of _winminor //in low byte


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So, i mite use liek so:


#include %26lt;STDLIB.H%26gt;


...


...


printf("Windpws Ver %d.%d\n", _winmajor,_winminor );





--------more from help ------[index on "OS"]-----


OSVERSIONINFO


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 or Windows 98.


For Windows 95, dwMinorVersion is zero.





For Windows 98, dwMinorVersion is greater than zero.





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.





QuickInfo


Windows NT: Requires version 3.5 or later.


Windows: Requires Windows 95 or later.


Windows CE: Requires version 1.0 or later.


Header: Declared in winbase.h.


Unicode: Defined as Unicode and ANSI structures.











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http://tutorialofc.blogspot.com/