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@ADeltaX
Last active March 3, 2024 03:42
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Example of creating a window using a private api on a dll-injected immersive process
#include "pch.h"
#pragma comment(lib, "gdi32.lib")
enum ZBID
{
ZBID_DEFAULT = 0,
ZBID_DESKTOP = 1,
ZBID_UIACCESS = 2,
ZBID_IMMERSIVE_IHM = 3,
ZBID_IMMERSIVE_NOTIFICATION = 4,
ZBID_IMMERSIVE_APPCHROME = 5,
ZBID_IMMERSIVE_MOGO = 6,
ZBID_IMMERSIVE_EDGY = 7,
ZBID_IMMERSIVE_INACTIVEMOBODY = 8,
ZBID_IMMERSIVE_INACTIVEDOCK = 9,
ZBID_IMMERSIVE_ACTIVEMOBODY = 10,
ZBID_IMMERSIVE_ACTIVEDOCK = 11,
ZBID_IMMERSIVE_BACKGROUND = 12,
ZBID_IMMERSIVE_SEARCH = 13,
ZBID_GENUINE_WINDOWS = 14,
ZBID_IMMERSIVE_RESTRICTED = 15,
ZBID_SYSTEM_TOOLS = 16,
ZBID_LOCK = 17,
ZBID_ABOVELOCK_UX = 18,
};
LRESULT CALLBACK TrashParentWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE:
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_WINDOWPOSCHANGING:
return 0;
case WM_CLOSE:
HANDLE myself;
myself = OpenProcess(PROCESS_ALL_ACCESS, false, GetCurrentProcessId());
TerminateProcess(myself, 0);
return true;
break;
default:
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
HWND hwnd = NULL;
typedef HWND(WINAPI* CreateWindowInBand)(_In_ DWORD dwExStyle, _In_opt_ ATOM atom, _In_opt_ LPCWSTR lpWindowName, _In_ DWORD dwStyle, _In_ int X, _In_ int Y, _In_ int nWidth, _In_ int nHeight, _In_opt_ HWND hWndParent, _In_opt_ HMENU hMenu, _In_opt_ HINSTANCE hInstance, _In_opt_ LPVOID lpParam, DWORD band);
void CreateWin(HMODULE hModule, UINT zbid, const wchar_t* title, const wchar_t* classname)
{
{
HINSTANCE hInstance = hModule;
WNDCLASSEX wndParentClass = {};
wndParentClass.cbSize = sizeof(WNDCLASSEX);
wndParentClass.cbClsExtra = 0;
wndParentClass.hIcon = NULL;
wndParentClass.lpszMenuName = NULL;
wndParentClass.hIconSm = NULL;
wndParentClass.lpfnWndProc = TrashParentWndProc;
wndParentClass.hInstance = hInstance;
wndParentClass.style = CS_HREDRAW | CS_VREDRAW;
wndParentClass.hCursor = LoadCursor(0, IDC_ARROW);
wndParentClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndParentClass.lpszClassName = classname;
auto res = RegisterClassEx(&wndParentClass);
const auto hpath = LoadLibrary(L"user32.dll");
const auto pCreateWindowInBand = CreateWindowInBand(GetProcAddress(hpath, "CreateWindowInBand"));
auto hwndParent = pCreateWindowInBand(WS_EX_TOPMOST | WS_EX_NOACTIVATE,
res,
NULL,
0x80000000,
0, 0, 0, 0,
NULL,
NULL,
wndParentClass.hInstance,
LPVOID(res),
zbid);
SetWindowLong(hwndParent, GWL_STYLE, 0);
SetWindowLong(hwndParent, GWL_EXSTYLE, 0);
SetWindowPos(hwndParent, nullptr, 40, 40, 600, 600, SWP_SHOWWINDOW | SWP_NOZORDER);
ShowWindow(hwndParent, SW_SHOW);
UpdateWindow(hwndParent);
if (hwndParent != nullptr)
hwnd = hwndParent;
}
}
DWORD WINAPI Thrd(LPVOID lpParam)
{
CreateWin(NULL, ZBID_SYSTEM_TOOLS, L"Really Genuine Window++", L"TestPlus");
MSG msg;
while (GetMessage(&msg, nullptr, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
BOOL APIENTRY DllMain(HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
CreateThread(nullptr, 0, Thrd, hModule, NULL, NULL);
break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
@ADeltaX
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ADeltaX commented Mar 24, 2020

Perfect, I'm happy that it worked fine for you!

I forgot to remove init_apartment since I was trying to put a xaml islands in it (without getting it to work at all). Also I forgot to zero memory wndParentClass. I've updated it accordingly.

Thank you!

PS:

This should be a public API, anyone can spawn RuntimeBroker.exe and open their window and do their code there, so what's the point of overprotecting this so much?

It's Microsoft, they haven't thought about dll injection lol

@valinet
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valinet commented Mar 24, 2020

It's Microsoft, they haven't thought about dll injection lol

Yeah, right? I was showing this to a friend and taking with him about how open Windows is in this regard... On Linux, it is much harder to achieve this, as far as I know.

I forgot to remove init_apartment since I was trying to put a xaml islands in it (without getting it to work at all).

For me, it would not run with the call there... Weird... Anyway, since you took the time to update it, please remove the using namespace winrt line at the top of the document as well.

Anyway, thank you very much again for this, I hope to turn it into a cool project that I am currently working on.

@ADeltaX
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ADeltaX commented Mar 24, 2020

init_apartment needs C++/WinRT "compiler toolchain" to work. Also it works only in Release AFAIK.

Anyway, since you took the time to update it, please remove the using namespace winrt line at the top of the document as well.

Updated! 😀

@valinet
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valinet commented Mar 24, 2020

init_apartment needs C++/WinRT "compiler toolchain" to work.

All right, this I have installed.

Also it works only in Release AFAIK.

All right, I did not know that. I was running in Debug, indeed.

Updated! 😀

Thanks ;)

@valinet
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valinet commented Mar 24, 2020

Anyway, how did you figure about this? Did you need it for some project, or...?
Also, do you happen to know of any hidden API or stuff like that than can hide buttons on the taskbar for UWP apps. The ITaskBarList interfaces (specifically DeleteTab()) work for regular apps, but not for UWP. Do you have any insight on this?
Thank you.

@jhuewel
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jhuewel commented Dec 17, 2020

Nice Work! Can this be used in a c# app?

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