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getsysteminfo (kernel32)
Retrieves information about the current system

C# Signature:


public static extern void GetSystemInfo()
     out SystemInfo input

public static SystemInfo GetSystemInfo()
     var stub = new SystemInfo();
     GetSystemInfo(out stub);
     return stub;

User-Defined Types:

    public enum ProcessorArchitecture
        X86 = 0,
        X64 = 9,
        @Arm = -1,
        Itanium = 6,
        Unknown = 0xFFFF,

    public struct SystemInfo
        public ProcessorArchitecture ProcessorArchitecture; // WORD
        public uint PageSize; // DWORD
        public IntPtr MinimumApplicationAddress; // (long)void*
        public IntPtr MaximumApplicationAddress; // (long)void*
        public IntPtr ActiveProcessorMask; // DWORD*
        public uint NumberOfProcessors; // DWORD (WTF)
        public uint ProcessorType; // DWORD
        public uint AllocationGranularity; // DWORD
        public ushort ProcessorLevel; // WORD
        public ushort ProcessorRevision; // WORD

Alternative Managed API:

To determine whether the OS or Process is x64, using .NET 4, see System.Environment (Is64BitProcess, Is64BitOperatingSystem);


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