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[StructLayout(LayoutKind.Sequential)]
private struct OSVERSIONINFOEX
{
public uint dwOSVersionInfoSize;
public uint dwMajorVersion;
public uint dwMinorVersion;
public uint dwBuildNumber;
public uint dwPlatformId;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string szCSDVersion;
public UInt16 wServicePackMajor;
public UInt16 wServicePackMinor;
public UInt16 wSuiteMask;
public byte wProductType;
public byte wReserved;
}
VB Signature:
Private Declare Function GetVersionEx Lib "kernel32.dll" _
Alias "GetVersionExA" _
(ByRef lpVersionInformation As OSVERSIONINFOEX) As Boolean
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _
Structure OSVERSIONINFOEX
Public dwOSVersionInfoSize As Integer
Public dwMajorVersion As Integer
Public dwMinorVersion As Integer
Public dwBuildNumber As Integer
Public dwPlatformId As Integer
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=128)> _
Public szCSDVersion As String
Public wServicePackMajor As Integer
Public wServicePackMinor As Integer
Public wSuiteMask As Integer
Public wProductType As Byte
Public wReserved As Byte
End Structure 'OSVERSIONINFOEX
'see if the current process is running on Windows XP
Public Function IsWinXP() As Boolean
'returns True if running Windows XP
Dim osv As New OSVERSIONINFOEX
osv.dwOSVersionInfoSize = Marshal.SizeOf(osv)
Dim si As New SYSTEM_INFO
If GetVersionEx(osv) = 1 Then
GetSystemInfo(si)
Return (osv.dwMajorVersion = 5 And osv.dwMinorVersion = 2)
Else
Return False
End If
End Function
'see if the current process is running on Windows Vista
Public Function IsWinVista() As Boolean
'returns True if running Windows Vista
Dim osv As New OSVERSIONINFOEX
osv.dwOSVersionInfoSize = Marshal.SizeOf(osv)
If GetVersionEx(osv) = 1 Then
Return (osv.wProductType = VER_NT_WORKSTATION And osv.dwMajorVersion = 6)
Else
Return False
End If
End Function
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
don't forget to set the dwOSVersionInfoSize
Sample Code:
OSVERSIONINFOEX osVersionInfo = new OSVERSIONINFOEX();
osVersionInfo.dwOSVersionInfoSize = Marshal.SizeOf(osVersionInfo); // don't forget this line, please!
GetVersionEx(ref osVersionInfo);
Alternative Managed API:
System.Environment.OSVersion is provided in all .Net versions and has the same information.
OperatingSystem Class from System namespace has similar properties and methods
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