Imports System.Runtime.InteropServices
Imports System.Text

Public Class NativeMethods
    <DllImport("user32.dll")>
    Public Shared Function GetDC(ByVal hwnd As IntPtr) As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function ReleaseDC(ByVal hwnd As IntPtr, ByVal hdc As IntPtr) As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetWindowRect(ByVal hWnd As HandleRef, ByRef lpRect As RectangleAPI) As Boolean
    End Function
    <DllImport("user32.dll")>
    Public Shared Function AttachThreadInput(ByVal idAttach As IntPtr, ByVal idAttachTo As IntPtr, fAttach As Boolean) As Boolean
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetFocus() As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function WindowFromPoint(ByVal p As PointAPI) As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetForegroundWindow() As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetWindowText(ByVal hWnd As IntPtr, ByVal WinTitle As String, ByVal MaxLength As Integer) As Integer
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetWindowTextLength(ByVal hwnd As Int32) As Integer
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, ByRef lpdwProcessID As Integer) As Integer
    End Function
    <DllImport("user32.dll")>
    Public Shared Function GetClassName(ByVal hwnd As Integer, ByVal lpClassName As StringBuilder, ByVal nMaxCount As Integer) As Integer
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function OpenProcess(ByVal dwDesiredAccess As UInteger, ByVal bInheritHandle As Boolean, ByVal dwProcessId As UInteger) As IntPtr
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function VirtualAllocEx(ByVal hProcess As IntPtr, ByVal lpAddress As IntPtr, ByVal dwSize As UIntPtr, ByVal flAllocationType As UInteger, ByVal flProtect As PageProtection) As IntPtr
    End Function
    <DllImport("user32.dll", SetLastError:=True)>
    Public Shared Function GetWindowThreadProcessId(ByVal hWnd As IntPtr, <Out> ByRef lpdwProcessId As UInteger) As UInteger
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function VirtualFreeEx(ByVal hProcess As IntPtr, ByVal lpAddress As IntPtr, ByVal dwSize As UIntPtr, ByVal dwFreeType As UInteger) As Boolean
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function CloseHandle(ByVal hObject As IntPtr) As Boolean
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function MapViewOfFile(ByVal hFileMappingObject As IntPtr, ByVal dwDesiredAccess As UInteger, ByVal dwFileOffsetHigh As UInteger, ByVal dwFileOffsetLow As UInteger, ByVal dwNumberOfBytesToMap As UIntPtr) As IntPtr
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function UnmapViewOfFile(ByVal lpBaseAddress As IntPtr) As Boolean
    End Function
    <DllImport("kernel32.dll", SetLastError:=True)>
    Public Shared Function CreateFileMapping(ByVal hFile As IntPtr, ByVal lpFileMappingAttributes As IntPtr, ByVal flProtect As PageProtection, ByVal dwMaximumSizeHigh As Integer, ByVal dwMaximumSizeLow As Integer, ByVal lpName As String) As IntPtr
    End Function
    <DllImport("user32.dll")>
    Public Shared Function SendMessage(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
    End Function
    <DllImport("kernel32.dll")>
    Public Shared Function ReadProcessMemory(ByVal hProcess As IntPtr, ByVal lpBaseAddress As IntPtr,
    <Out> ByVal lpBuffer As Byte(), ByVal nSize As UIntPtr, ByVal lpNumberOfBytesRead As IntPtr) As Boolean
    End Function
    <DllImport("Kernel32.dll", EntryPoint:="RtlMoveMemory", SetLastError:=False)>
    Public Shared Sub MoveMemoryFromByte(ByVal dest As IntPtr, ByRef src As Byte, ByVal size As Integer)
    End Sub
    <DllImport("Kernel32.dll", EntryPoint:="RtlMoveMemory", SetLastError:=False)>
    Public Shared Sub MoveMemoryToByte(ByRef dest As Byte, ByVal src As IntPtr, ByVal size As Integer)
    End Sub
    <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
    Public Shared Function RegisterWindowMessage(ByVal lpString As String) As Integer
    End Function
    <DllImport("user32.dll", ExactSpelling:=True, SetLastError:=True)>
    Public Shared Function GetCursorPos(ByRef lpPoint As PointAPI) As <MarshalAs(UnmanagedType.Bool)> Boolean
    End Function

    Public Const STANDARD_RIGHTS_REQUIRED As Integer = &HF0000
    Public Const SECTION_QUERY As Short = &H1
    Public Const SECTION_MAP_WRITE As Short = &H2
    Public Const SECTION_MAP_READ As Short = &H4
    Public Const SECTION_MAP_EXECUTE As Short = &H8
    Public Const SECTION_EXTEND_SIZE As Short = &H10
    Public Const SECTION_ALL_ACCESS As Integer = STANDARD_RIGHTS_REQUIRED Or SECTION_QUERY Or SECTION_MAP_WRITE Or SECTION_MAP_READ Or SECTION_MAP_EXECUTE Or SECTION_EXTEND_SIZE
    Public Const FILE_MAP_ALL_ACCESS As Integer = SECTION_ALL_ACCESS
    Public Const PROCESS_VM_OPERATION As Short = &H8
    Public Const PROCESS_VM_READ As Short = &H10
    Public Const PROCESS_VM_WRITE As Short = &H20
    Public Const PROCESS_ALL_ACCESS As Long = &H1F0FFF
    Public Const MEM_COMMIT As Short = &H1000
    Public Const MEM_RESERVE As Short = &H2000
    Public Const MEM_DECOMMIT As Short = &H4000
    Public Const MEM_RELEASE As Integer = &H8000
    Public Const MEM_FREE As Integer = &H10000
    Public Const MEM_PRIVATE As Integer = &H20000
    Public Const MEM_MAPPED As Integer = &H40000
    Public Const MEM_TOP_DOWN As Integer = &H100000
    Public Const INVALID_HANDLE_VALUE As Integer = -1

    Public Enum PageProtection As UInteger
        NoAccess = &H1
        [Readonly] = &H2
        ReadWrite = &H4
        WriteCopy = &H8
        Execute = &H10
        ExecuteRead = &H20
        ExecuteReadWrite = &H40
        ExecuteWriteCopy = &H80
        Guard = &H100
        NoCache = &H200
        WriteCombine = &H400
    End Enum

    Public Enum ChildWindowFromPointFlags As UInteger
        CWP_ALL
        CWP_SKIPINVISIBLE
        CWP_SKIPDISABLED
        CWP_SKIPTRANSPARENT
    End Enum

    Public Structure RectangleAPI
        Public Left As Integer
        Public Top As Integer
        Public Right As Integer
        Public Bottom As Integer

        Public Overrides Function ToString() As String
            Return String.Format("Top: {0}, Bottom: {1}, Left: {2}, Right: {3}", Top, Bottom, Left, Right)
        End Function
    End Structure

    <System.Runtime.InteropServices.StructLayout(Runtime.InteropServices.LayoutKind.Sequential)>
    Public Structure PointAPI
        Public X As Integer
        Public Y As Integer

        Public Sub New(ByVal X As Integer, ByVal Y As Integer)
            Me.X = X
            Me.Y = Y
        End Sub
    End Structure
End Class