C# Signature:

    [DllImport("kernel32.dll")]
    static extern int VirtualQueryEx(IntPtr hProcess, IntPtr lpAddress, out MEMORY_BASIC_INFORMATION lpBuffer, uint dwLength);

C# User-Defined Types:

MEMORY_BASIC_INFORMATION

    [StructLayout(LayoutKind.Sequential)]
    public struct MEMORY_BASIC_INFORMATION
    {
    public IntPtr BaseAddress;
    public IntPtr AllocationBase;
    public uint AllocationProtect;
    public IntPtr RegionSize;
    public uint State;
    public uint Protect;
    public uint Type;
    }

Notes:

VirtualQueryEx returns 0 on failure.

Tips & Tricks:

Please add some!

Sample Code:

The following code demonstrates how to list all regions within a process' memory address.

long MaxAddress = 0x7fffffff;

long address = 0;

do

{

    MEMORY_BASIC_INFORMATION m;
    int result = VirtualQueryEx(System.Diagnostics.Process.GetCurrentProcess().Handle, (IntPtr)address, out m, (uint)Marshal.SizeOf(typeof(MEMORY_BASIC_INFORMATION)));
    Console.WriteLine("{0}-{1} : {2} bytes result={3}", m.BaseAddress, (uint)m.BaseAddress + (uint)m.RegionSize - 1, m.RegionSize, result);
    if (address == (long)m.BaseAddress + m.RegionSize)
    break;
    address = (long)m.BaseAddress + m.RegionSize;

} while (address <= MaxAddress);

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