DB!...

http://forum.cheatengine.org/viewtopic.php?t=606184

hm, PostMessage should be able to manage it.

http://tools.stefankueng.com/SendMessage.html works

Though I tried creating this for x64 notepad and it didn't so clearly I've done something wrong

[code]local WM_KEYDOWN = 0x0100
local WM_KEYUP = 0x0101
local WM_CHAR = 0x102

local pmsScript = [[
[ENABLE]
  alloc(postMessageStub,$1000)
  registerSymbol(postMessageStub)
  postMessageStub:
    push rbp
    mov rbp, rsp
    mov edx, [rcx+8]
    mov r8, [rcx+10]
    mov r9, [rcx+18]
    mov rcx, [rcx+0]
    sub rsp, 20
    call PostMessageA
    add rsp, 20
    pop rbp
    ret
[DISABLE]
  unregisterSymbol(postMessageStub)
  dealloc(postMessageStub)
]]
success, pms = autoAssemble(pmsScript)
if not success then error('failed to create stub!') end

PostMessage = function(hwnd, msg, wparam, lparam)
  local postMessageMem = allocateMemory(32)
  writeQword(postMessageMem+0, hwnd)
  writeQword(postMessageMem+8, msg)
  writeQword(postMessageMem+16, wparam)
  writeQword(postMessageMem+24, lparam)
  executeCode('PostMessageStub',postMessageMem)
  deAlloc(postMessageMem)
end

local hwnd = 0
local t = createTimer()
t.Interval = 100
local sendCount = 0
t.OnTimer = function(t)
  if hwnd == 0 then -- check if current foreground window is attached process's
    if getForegroundProcess() == getOpenedProcessID() then
      hwnd = getForegroundWindow()
      print('found')
    end
  else -- once we have the hwnd
    sendCount = sendCount + 1
    if sendCount >= 10 then
      t.destroy()
      autoAssemble(pmsScript, pms)
      print('done')
      return
    end
    PostMessage(hwnd, WM_KEYDOWN, VK_A, 1) -- VK_A = 65
  end
end[/code]

Though I was able to use shellExecute to run that program from the command line essentially:

[code]local cmd = os.getenv('userprofile') .. '\\Desktop\\SendMessage-1.1.2.exe'
local params ='/message:256 /wparam:65 /lparam:1 /post /windowclass:Edit /processname:' .. process
shellExecute(cmd, params)
[/code]

65 is the code for 'a', F1 is 112 but I wanted something easier to test with. It also didn't work without the /windowclass but you can get that by running the SendMessage program and dragging the target/reticle to the game. Of course, once you get the window handle once