[RESOLVED] SendMessage for a game

[PointToZero]

Try passing your child windows to this before the click.

ScreenToClient(handles[i], &pt);

You can also use ShowWindow() to maximize your window and then work with screen coords(probably not the best way, but it works).


EDIT: How do you find hMU?

if you are using this like in your previous post it might be a source for error.

HWND hMU = FindWindow(NULL, "Untitled - Notepad");
hMU = FindWindowEx(hMU, NULL, "EDIT", NULL);

you should only need

HWND hMU = FindWindow(NULL, "APP TITLE");

and then find the child windows normally with EnumChildWindow

I'm sorry, I forgot to change the first parameter of ScreenToClient, as you mentioned. Now the same popup menu appears at 100:100 of Desktop window.

This is how I find hMU:

HWND hMU = FindWindow("MU", "Mu Online");

I used Spy++ and my code on the game window, and they both detected same handle value for the game. When I change class name to NULL, it works too. Could the anticheat prevent my attempts to click, probably with a global mouse hook?

[Austin.Soucy]

Unfortunately I am stumped at this point...I tried

If you are using the correct HWND and passing correct client coords I see no reason that it should not work. Maybe if you post your full code we can defer to someone that has more knowledge than I do. Also, perhaps a screenshot of the game? Is this a full-screen game or windowed?

[PointToZero]

Unfortunately I am stumped at this point...I tried

If you are using the correct HWND and passing correct client coords I see no reason that it should not work. Maybe if you post your full code we can defer to someone that has more knowledge than I do. Also, perhaps a screenshot of the game? Is this a full-screen game or windowed?

Thank you for efforts! This is the full code of how I test Send/PostMessage. If you want to take a look at the whole project (I mean, everything except this PostMessage), I can post it too, because the code is compact.

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	switch (Msg)
	{
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
			
		case WM_KEYDOWN:
		{
			HWND hMU = FindWindow("MU", "InsaniaMU");
			
			if (wParam == VK_F11)
			{
				PostMessage(hMU, WM_RBUTTONDOWN, 0, MAKELPARAM(200, 200));
			}
			else if (wParam == VK_F12)
			{
				
				PostMessage(hMU, WM_RBUTTONUP, 0, MAKELPARAM(200, 200));
			}
			break;
		}
		
		default:
			return DefWindowProc(hWnd, Msg, wParam, lParam);
	}
	
	return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int)
{
	WNDCLASSEX wndclass;
	wndclass.cbSize        = sizeof(WNDCLASSEX);
        wndclass.style         = 0;
        wndclass.lpfnWndProc   = WndProc;
        wndclass.cbClsExtra    = 0;
        wndclass.cbWndExtra    = 0;
        wndclass.hInstance     = hInstance;
        wndclass.hIcon         = NULL;
        wndclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = (HBRUSH)COLOR_3DSHADOW;
        wndclass.lpszMenuName  = NULL;
        wndclass.lpszClassName = "WINDOWCLASS";
        wndclass.hIconSm       = NULL;
	RegisterClassEx(&wndclass);
	
	CreateWindow("WINDOWCLASS", "123", WS_CAPTION | WS_SYSMENU | WS_VISIBLE, 10, 10, 100, 100, NULL, NULL, hInstance, NULL);
	
	MSG Msg;
        while(GetMessage(&Msg, NULL, 0, 0) > 0)
        {
                TranslateMessage(&Msg);
                DispatchMessage(&Msg);
        }

	return 0;
}

The game can be full-screen or windowed, it depends on the setting. I was testing the code above with a windowed game. It said the game screenshot is too large, so there's the link to photobucket, hopefully it won't be treated as an advertisement: http://i1135.photobucket.com/albums/...ttozero/mu.jpg

Thanks!

[PointToZero]

So, yesterday I found the solution. Maybe it's ugly now, but that's only because I don't know yet what exactly each of my SendMessages do. I just used Spy++ on the game window and caught all the messages it received when I hovered the mouse over it and pressed and released the right mouse button. I tried to send the caught messages into the game window from my program, and finally got my program working.

void OnRMouseButtonDown(void)
{
	WINDOWPOS wp = {hMU, NULL, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE};

	SendMessage(hMU, WM_SETCURSOR, (WPARAM)hMU, MAKELPARAM(HTCLIENT, WM_MOUSEMOVE));
	SendMessage(hMU, WM_MOUSEACTIVATE, (WPARAM)hMU, MAKELPARAM(HTCLIENT, WM_RBUTTONDOWN));
	SendMessage(hMU, WM_WINDOWPOSCHANGING, 0, (LPARAM)&wp);
	SendMessage(hMU, WM_NCPAINT, 1, 0);
	SendMessage(hMU, WM_WINDOWPOSCHANGED, 0, (LPARAM)&wp);
	SendMessage(hMU, WM_ACTIVATEAPP, 1, 0);
	SendMessage(hMU, WM_NCACTIVATE, 1, 0);
	SendMessage(hMU, WM_ACTIVATE, WA_CLICKACTIVE, 0);
	SendMessage(hMU, WM_SETFOCUS, 0, 0);
	SendMessage(hMU, WM_SETCURSOR, (WPARAM)hMU, MAKELPARAM(1, WM_RBUTTONDOWN));

	PostMessage(hMU, WM_RBUTTONDOWN, 2, 0x1530279);
}

void OnRMouseButtonUp(void)
{
	PostMessage(hMU, WM_RBUTTONUP, 0, 0x1530279);

	SendMessage(hMU, WM_CAPTURECHANGED, 0, 0);
}

Therefore, if you have a task similar to what I had, use Spy++ and repeat all the messages you caught with it.

Thank you all!