C++ get windows title using process name - c++

Question

edit: how can i get windows title using processname? for example get current title of chrome.exe

Answer 1

You can get title of specific windows using it's process ID.
If you know the name of executed file(ex: Chrome.exe), you can get Handle with FindWindowEX() or get PID "Chrome.exe" with CreateToolHelp32Snapshot.
Then use EnumWindows to get HWND using HANDLE.
struct param_enum
{
unsigned long ulPID;
HWND hWnd_out;
};
HWND find_specific_window(unsigned long process_id)
{
param_enum param_data;
param_data.ulPID = process_id;
param_data.hWnd_out = 0;
EnumWindows(enum_windows_callback, (LPARAM)&param_data);
get_window_title(process_id, param_data.hWnd_out);
return param_data.hWnd_out;
}
BOOL CALLBACK enum_windows_callback(HWND handle, LPARAM lParam)
{
param_enum& param_data = *(param_enum*)lParam;
unsigned long process_id = 0;
GetWindowThreadProcessId(handle, &process_id);
if (param_data.ulPID != process_id)
{
return TRUE;
}
param_data.hWnd_out = handle;
return FALSE;
}
---------------------------Get Handle---------------------------
HANDLE GetHandleFromProcessPath(TCHAR* szExeName, DWORD& dwPID)
{
HANDLE hExeName = INVALID_HANDLE_VALUE;
HANDLE hSnap = INVALID_HANDLE_VALUE;
PROCESSENTRY32 pe32;
pe32.dwSize = sizeof(PROCESSENTRY32);
hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (INVALID_HANDLE_VALUE != hSnap)
{
if (Process32First(hSnap, &pe32))
{
do
{
//!!! Attention pe32.szExeFile always return exe file name. not window title.
if (NULL != _tcsstr(pe32.szExeFile, szExeName))
{
hExeName = OpenProcess(PROCESS_ALL_ACCESS, TRUE, pe32.th32ProcessID);
dwPID = pe32.th32ProcessID;
break;
}
} while (Process32Next(hSnap, &pe32));
}
}
return hExeName;
}

Answer 2

Completing the answer of "G.Alexander" and and the comment of Skewjo
the get_window_title code is incomplete. So, worked for me, by removing it and calling find_specific_window like below:
wchar_t* caption = new wchar_t[MAX_PATH*2];
HWND h = find_specific_window(processID);
GetWindowTextW(h, caption, MAX_PATH*2);