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exohaxor
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PostPosted: Sun Apr 12, 2020 3:08 pm    Post subject: postMessage Reply with quote
is there postMessage function so i can send keys to background windows?
i tried sendMessage but it didnt work
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Corroder
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PostPosted: Sun Apr 12, 2020 7:59 pm    Post subject: Reply with quote
I usually use something like this:

Code:
function postMessage(hwnd,  wMsg, wParam, lParam)
 return executeCodeLocalEx("user32.SendMessageA", hwnd,  wMsg, wParam, lParam)
end

function FindWindowN(lpClassName, lpWindowName)
 return executeCodeLocalEx("user32.FindWindowA", lpClassName, lpWindowName)
end

function FindWindowExAZ(hWnd1, hWnd2, lpsz1, lpsz2)
 return executeCodeLocalEx("user32.FindWindowExA", hWnd1, hWnd2, lpsz1, lpsz2)
end


WM_SETTEXT = 0x000C
WM_CLOSE = 0x0010

function test()
 local iHwnd = FindWindowN("notepad", 0)
 local iHwndChild  = FindWindowExAZ(iHwnd, 0, "Edit", 0)
 -- postMessage(iHwnd, WM_CLOSE, 0, 0)
 postMessage(iHwndChild, WM_SETTEXT, 0, "Hello World!")
end

-- open notepad and test
test()

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exohaxor
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PostPosted: Mon Apr 13, 2020 5:12 am    Post subject: Reply with quote
what am i doing wrong?
Code:

function postMessage(hwnd,  wMsg, wParam, lParam)
 return executeCodeLocalEx("user32.SendMessageA", hwnd,  wMsg, wParam, lParam)
end

function FindWindowN(lpClassName, lpWindowName)
 return executeCodeLocalEx("user32.FindWindowA", lpClassName, lpWindowName)
end

function FindWindowExAZ(hWnd1, hWnd2, lpsz1, lpsz2)
 return executeCodeLocalEx("user32.FindWindowExA", hWnd1, hWnd2, lpsz1, lpsz2)
end


WM_SETTEXT = 0x000C
WM_CLOSE = 0x0010
WM_KEYDOWN = 0x0100
function test()
 local iHwnd = FindWindowN("notepad", 0)

 local iHwndChild  = FindWindowExAZ(iHwnd, 0, "Edit", 0)

 -- postMessage(iHwnd, WM_CLOSE, 0, 0)
 postMessage(iHwndChild, WM_KEYDOWN, VK_KEY_W, 1)
end

-- open notepad and test
test()

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Corroder
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PostPosted: Mon Apr 13, 2020 7:41 am    Post subject: Reply with quote
Try open another app that has W key on their menu.
VK_KEY_W is AHK format, I think it must be VK_W.

On your script, you are trying to send pressed W key to notepad window which doesn't have W key notepad menu or sub-menu. So that will effect nothing.

Instead of using WM_COMMAND with sendMessage(), it should be good using post message function.

Example. work with notepad:

Code:
function FindWindowN(lpClassName, lpWindowName)
 return executeCodeLocalEx("user32.FindWindowA", lpClassName, lpWindowName)
end

function PostMessage(hWnd, Msg, wParam, lParam )
 return executeCodeLocalEx("user32.PostMessageA", hWnd, Msg, wParam, lParam)
end

function test()
 local iHwnd = FindWindowN("notepad", 0)
 PostMessage(iHwnd, 0x0111, 0x0005, 0x0)   -- Will open submenu Page Setup in notepad app.
    -- 0x0111 = notepad menu 'File'
    -- 0x0005 = notepad sub-menu File -> Page Setup
end

test()


Conclusion:
- The key command is different for each application.
- Keep looking or search for keycode parameters use with user32.dll sendMessage and PostMessage.

I don't know if there is simple way to do this with pure CE Lua functions.
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exohaxor
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PostPosted: Mon Apr 13, 2020 12:02 pm    Post subject: Reply with quote
sorry to bump again but how can i use SendInput in CE?
i found this code for c++
Code:

#define WINVER 0x0500
#include <windows.h>

using namespace std;

int main()
{

    //Structure for the keyboard event
    INPUT ip;

    Sleep(5000);

    //Set up the INPUT structure
    ip.type = INPUT_KEYBOARD;
    ip.ki.time = 0;
    ip.ki.wVk = 0; //We're doing scan codes instead
    ip.ki.dwExtraInfo = 0;

    //This let's you do a hardware scan instead of a virtual keypress
    ip.ki.dwFlags = KEYEVENTF_SCANCODE;
    ip.ki.wScan = 0x1E;  //Set a unicode character to use (A)

    //Send the press
    SendInput(1, &ip, sizeof(INPUT));

    //Prepare a keyup event
    ip.ki.dwFlags = KEYEVENTF_SCANCODE | KEYEVENTF_KEYUP;
    SendInput(1, &ip, sizeof(INPUT));



    return 0;
}

but how can i set input structure etc in lua
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AylinCE
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PostPosted: Mon Apr 13, 2020 2:48 pm    Post subject: Reply with quote
exohaxor wrote:

but how can i set input structure etc in lua


Maybe like this,
Code:
function Pass()
input=""
input = inputQuery(mi.Caption, "Please enter valid password.", input)

if input=="2545" then
print("Done ", input)
else
Print("None ", input)
end
end

Htky=createHotkey(Pass, VK_F8)

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Corroder
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PostPosted: Mon Apr 13, 2020 7:02 pm    Post subject: Reply with quote
exohaxor wrote:
sorry to bump again but how can I use SendInput in CE?
but how can i set input structure etc in lua


You might considering:

https://github.com/michaelnoonan/inputsimulator
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Dark Byte
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PostPosted: Tue Apr 14, 2020 12:24 am    Post subject: Reply with quote
use a memorystream object to setup the structure
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exohaxor
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PostPosted: Tue Apr 14, 2020 3:06 am    Post subject: Reply with quote
Corroder wrote:
exohaxor wrote:
sorry to bump again but how can I use SendInput in CE?
but how can i set input structure etc in lua


You might considering:

https://github.com/michaelnoonan/inputsimulator

isnt that c#?
i want to do it in cheat engine
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Dark Byte
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PostPosted: Tue Apr 14, 2020 5:08 am    Post subject: Reply with quote
sendinput sends to the foreground window

which is the same a keyDown/keyUp and keyPress in ce's lua (which also calls sendinput)
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Corroder
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PostPosted: Tue Apr 14, 2020 7:15 am    Post subject: Reply with quote
exohaxor wrote:
i want to do it in cheat engine


Here examples using CE Lua script to send keys stroke to specific app. In this sample I use window notepad:

1. Adapting functions from WIN API (FindWindowA, SetForegroundWindow, keybd_event)

Code:
function FindWindowA(lpClassName, lpWindowName)
 return executeCodeLocalEx("user32.FindWindowA", lpClassName, lpWindowName)
end

function SetForegroundWindowA(hWnd)
 return executeCodeLocalEx("user32.SetForegroundWindow", hWnd)
end

function KeyboardEvent(bVk, bScan, dwFlags, dwExtraInfo)
 return executeCodeLocalEx("user32.keybd_event", bVk, bScan, dwFlags, dwExtraInfo)
end

KEYEVENTF_KEYUP = 0x2
VK_MENU = 0x12

function keybind() -- example to open 'File Menu' on notepad window
 local target = 'notepad'
 gamewindow = SetForegroundWindowA(FindWindowA(target,0)) -- focus to notepad window
 KeyboardEvent(VK_MENU, 0, 0, 0)  -- press ALT ley
 KeyboardEvent(VK_F, 0, 0, 0)  -- press F key
 KeyboardEvent(VK_F, 0, KEYEVENTF_KEYUP, 0)  -- release F key
 KeyboardEvent(VK_MENU, 0, KEYEVENTF_KEYUP, 0)  -- release ALT key
end

-- test : open notepas first
keybind()



2. Using pure CE Lua functions

Code:
-- test open note File Menu
ps1 = 'start notepad.exe'
p1 = os.execute(ps1)
sleep(1000)
openProcess('notepad.exe')
w=getWindow(getForegroundWindow(), GW_HWNDFIRST)
pid=getOpenedProcessID()

while w and (w~=0) do
 if (getWindowProcessID(w)==pid) and (executeCodeLocal("IsWindowVisible",w)~=0) then
    keyDown(VK_MENU)
    keyDown(VK_F)
    sleep(100)
    keyUp(VK_MENU)
    keyUp(VK_F)
 end
 w=getWindow(w, GW_HWNDNEXT)
end



3. Alternative, write a vbscript and then call it from CE

vbscript example:

Code:
Set WshShell = WScript.CreateObject("WScript.Shell")

WshShell.Run "%windir%\notepad.exe"
WshShell.AppActivate "Notepad"

WshShell.SendKeys "Hello World!"
WshShell.SendKeys "{ENTER}"
WshShell.SendKeys "abc"
WshShell.SendKeys "{CAPSLOCK}"
WshShell.SendKeys "def"


Save that script as a vbs file, i.e: mykeybind.vbs and call it from CE Lua:

Code:
os.execute([path to vbs file]..'\\mykeybind.vbs')


If you want using sendInput WIN API then you need generated the structure of pInputs first (google is your friend), but if must adapting to CE Lua function, should be like this:

Code:
function SendInputA(cInputs, pInputs, cbSize)
 return executeCodeLocalEx("user32.SendInput", cInputs, pInputs, cbSize)
end

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