如何使用winapi在Windows中获取当前活动窗口的进程名称？

Question

I'm trying to get the current window or the active window and the process name of that window, in Windows with winapi.

So, I was able to get the active window with GetForegroundWindow() and I'm using OpenProcess() to get the process, the problem it's that OpenProcess needs the process id, so I though I could use GetProcessId() but this one receives the window in a HANDLE type and I have the current window in HWND type.

I've try a couple of things but couldn't made it work. So can anyone tell how can I get the process id with the window in HWND ?? or get the HANDLE of current window ??

I leave my code in here in case some sees a solution that could be helpful for me. I'm working with Qt and C++

char wnd_title[256];
HWND hwnd=GetForegroundWindow(); // get handle of currently active window
GetWindowText(hwnd,wnd_title,sizeof(wnd_title));
HANDLE Handle = OpenProcess(
                  PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
                  FALSE,
                  GetProcessId(hwnd) // GetProcessId is returning 0
                );
if (Handle)
{
  TCHAR Buffer[MAX_PATH];
  if (GetModuleFileNameEx(Handle, 0, Buffer, MAX_PATH))
  {
    printf("Paht: %s", Buffer);
    // At this point, buffer contains the full path to the executable
  }
  CloseHandle(Handle);
}

Answer 1

You can use GetWindowThreadProcessId() , which takes in an HWND and outputs the ID of the window's owning process.

For example:

#include <tchar.h>

TCHAR wnd_title[256];
HWND hwnd = GetForegroundWindow(); // get handle of currently active window
GetWindowTextA(hwnd, wnd_title, 256);

DWORD dwPID;
GetWindowThreadProcessId(hwnd, &dwPID);

HANDLE Handle = OpenProcess(
                  PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
                  FALSE,
                  dwPID
                );
if (Handle)
{
    TCHAR Buffer[MAX_PATH];
    if (GetModuleFileNameEx(Handle, 0, Buffer, MAX_PATH))
    {
        _tprintf(_T("Path: %s"), Buffer);
        // At this point, buffer contains the full path to the executable
    }
    CloseHandle(Handle);
}