VC根据进程ID获得主窗口句柄（不是进程句柄）

typedef struct

{

 HWND hWnd;

 DWORD dwPid;

}WNDINFO;



BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam)

{

 WNDINFO* pInfo = (WNDINFO*)lParam;

 DWORD dwProcessId = 0;

 GetWindowThreadProcessId(hWnd, &dwProcessId);



 if(dwProcessId == pInfo->dwPid)

 {

  pInfo->hWnd = hWnd;

  return FALSE;

 }

 return TRUE;

}



HWND GetHwndByProcessId(DWORD dwProcessId)

{

 WNDINFO info = {0};

 info.hWnd = NULL;

 info.dwPid = dwProcessId;

 EnumWindows(EnumWindowsProc, (LPARAM)&info);

 return info.hWnd;

}