C++ Get Another Windows Hwnd In Same Process - c++

Question

I've made a dll that you can inject into applications. I want that dll to find another window in the same process.
Here you can see a example. The console host (Konsolfönstervärd) is the dll I injected and I want that to find the lockdown-example window hwnd.
It is very simple to get the handle with the window title. But I don't want to hardcode it for just that application.
HWND parentHandle = FindWindowA(NULL, "Lockdown Example");
I have also tried some stuff with EnumWindows which basically prints all visible windows and their window title. And in the output of that you can see the "Lockdown Example" window.
10828: TheDll
388: Lockdown Example
13380: Microsoft Store
6664: Program Manager
How would I make it only do something when it found the "Lockdown Example" without just giving it a hardcoded title. Instead giving it something like GetCurrentProcessId()
static BOOL CALLBACK enumWindowCallback(HWND hWnd, LPARAM lparam) {
//GetWindowThreadProcessId();
int length = GetWindowTextLength(hWnd);
char* buffer = new char[length + 1];
GetWindowText(hWnd, buffer, length + 1);
std::string windowTitle(buffer);
// List visible windows with a non-empty title
if (IsWindowVisible(hWnd) && length != 0) {
cout << GetWindowThreadProcessId(hWnd, NULL) << ": " << windowTitle << endl;
}
return TRUE;
}
EnumWindows(enumWindowCallback, NULL)

Answer 1

So I came up to a answer with modifying the enumWindowCallback a little bit.
BOOL CALLBACK enumWindowCallback(HWND hwnd, LPARAM lParam)
{
int length = GetWindowTextLength(hwnd);
char* buffer = new char[length + 1];
GetWindowText(hwnd, buffer, length + 1);
std::string windowTitle(buffer);
DWORD lpdwProcessId;
GetWindowThreadProcessId(hwnd, &lpdwProcessId);
// 1. Checks if the current process is not equals to the value given in the lParam
// 2. Check if the current window is visible
// 3. Check if its not a empty name
// 4. Check so it is not the console window
// All these filters result in to only show all visible windows in the process
// Which in my case is "17260 | 15800: Lockdown Example"
if (lpdwProcessId == lParam && IsWindowVisible(hwnd) && length != 0
&& GetWindowThreadProcessId(GetConsoleWindow(), NULL) != GetWindowThreadProcessId(hwnd, NULL))
{
// Here you can do anything with the window handle (hwnd)
cout << lpdwProcessId << " | "<< GetWindowThreadProcessId(hwnd, NULL) << ": " << windowTitle << endl;
}
return TRUE;
}
Called it with:
EnumWindows(enumWindowCallback, GetCurrentProcessId()); // iterate over all windows