C# Signature:

[DllImport("kernel32.dll", SetLastError=true, ExactSpelling=true)]
static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress,
   uint dwSize, AllocationType flAllocationType, MemoryProtection flProtect);

VB.NET Signature:

<DllImport("kernel32.dll", SetLastError:=True, ExactSpelling:=True)> _

    Private Function VirtualAllocEx(ByVal hProcess As IntPtr, ByVal lpAddress As IntPtr, _
    ByVal dwSize As UInteger, ByVal flAllocationType As UInteger, _
    ByVal flProtect As UInteger) As IntPtr
    End Function

User-Defined Types:

  [Flags()]
  public enum AllocationType:uint
  {
    COMMIT=0x1000,
    RESERVE=0x2000,
    RESET=0x80000,
    LARGE_PAGES=0x20000000,
    PHYSICAL=0x400000,
    TOP_DOWN=0x100000,
    WRITE_WATCH=0x200000
  }

  [Flags()]
  public enum MemoryProtection:uint
  {
    EXECUTE=0x10,
    EXECUTE_READ=0x20,
    EXECUTE_READWRITE=0x40,
    EXECUTE_WRITECOPY=0x80,
    NOACCESS=0x01,
    READONLY=0x02,
    READWRITE=0x04,
    WRITECOPY=0x08,
    GUARD_Modifierflag=0x100,
    NOCACHE_Modifierflag = 0x200,
    WRITECOMBINE_Modifierflag = 0x400
  }

Notes:

None.

Tips & Tricks:

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Sample Code:

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Alternative Managed API:

The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a ProcessMemoryChunk class to allocate and access memory of a different process.

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