How to find owner process ID?

[Nayan]

The base process owns this thread. But the visible window is owned by
the thread.

How do I get the owner Process ID from a Thread ID?
To understand, look at this "<<--" pointer in the following code.
sample code:

using HWND = IntPtr;
public struct ProcInfo
{
public string ProcessName;
public int ProcessID;
public string ProcessFileName ;
public int ProcessInstance ;
public string ProcessWindowTi tle;
};

public static IDictionary<HWN D, ProcInfogetOpen Windows()
{
Dictionary<HWND , ProcInfodictWin dows = new Dictionary<HWND ,
ProcInfo>();

HWND hwndShellWindow = GetShellWindow( );

EnumWindows(
delegate(HWND hWnd, int lParam)
{
if (hWnd == hwndShellWindow )
return true;

if (!IsWindowVisib le(hWnd))
return true;

int lengthWindowTit le = GetWindowTextLe ngth(hWnd);
if (lengthWindowTi tle == 0)
return true;
//A process who has a window is found!!!! Great!

ProcInfo tempProc = new ProcInfo();

StringBuilder strWindowTitle = new
StringBuilder(l engthWindowTitl e);
GetWindowText(h Wnd, strWindowTitle, lengthWindowTit le + 1);
tempProc.Proces sWindowTitle = strWindowTitle. ToString();

HWND processInstance = GetWindowLong(h Wnd,
(int)Indices.GW L_HINSTANCE);
tempProc.Proces sInstance = (int)processIns tance;

HWND processID = GetWindowThread ProcessId(hWnd,
IntPtr.Zero);
tempProc.Proces sID = (int)processID;

foreach (Process proc in Process.GetProc esses())
{
if (proc.Id == (int)processID) // <<-- This never
matches :((
{
tempProc.Proces sName = proc.ProcessNam e;
tempProc.Proces sFileName =
proc.MainModule .FileName;
break;
}
}

dictWindows[hWnd] = tempProc;

return true;
},
0
);

return dictWindows;
}

delegate bool EnumWindowsProc (HWND hWnd, int lParam);

[DllImport("USER 32.DLL")]
static extern HWND GetShellWindow( );
[DllImport("USER 32.DLL")]
static extern bool IsWindowVisible (HWND hWnd);
[DllImport("USER 32.DLL")]
static extern int GetWindowText(H WND hWnd, StringBuilder lpString, int
nMaxCount);
[DllImport("USER 32.DLL")]
static extern int GetWindowTextLe ngth(HWND hWnd);
[DllImport("USER 32.DLL")]
static extern HWND GetWindowLong(H WND hWnd, int nIndex);
[DllImport("USER 32.DLL")]
static extern HWND GetWindowThread ProcessId(HWND hWnd, HWND
lpdwProcessId);

Thanks,
Nayan

[Lucian Wischik]

"Nayan" <cn****@gmail.c omwrote:

>The base process owns this thread. But the visible window is owned by
the thread.
How do I get the owner Process ID from a Thread ID?
HWND processID = GetWindowThread ProcessId(hWnd,
IntPtr.Zero) ;

in c++/win32 you'd write
DWORD processId;
DWORD threadId = GetWindowThread ProcessId(hwnd, &processId);

I think you got your arguments the wrong way round. You need to pass
processId as an "out" argument.

--
Lucian

[Nayan]

Yes, you are right!!

But i m not very good in C#. How can i get the value in a variable like
this by reference??

Is this correct??
HWND processID;
HWND threadID = GetWindowThread ProcessId(hWnd, processID);
Thanks a million! :)
Nayan
On Dec 9, 3:36 am, Lucian Wischik <l...@wischik.c omwrote:

"Nayan" <cna...@gmail.c omwrote:

The base process owns this thread. But the visible window is owned by
the thread.
How do I get the owner Process ID from a Thread ID?
HWND processID = GetWindowThread ProcessId(hWnd,
IntPtr.Zero);in c++/win32 you'd write

DWORD processId;
DWORD threadId = GetWindowThread ProcessId(hwnd, &processId);

I think you got your arguments the wrong way round. You need to pass
processId as an "out" argument.

--
Lucian

[Lucian Wischik]

"Nayan" <cn****@gmail.c omwrote:

>But i m not very good in C#. How can i get the value in a variable like
this by reference?

[DllImport("user 32.dll")] static extern UInt32
GetWindowThread ProcessId(HWND hwnd, out UInt32 processId);

....
UInt32 pid;
UInt32 tid = GetWindowThread Processid(hwnd, out pid);

--
Lucian

[Nayan]

Ya, I got the solution at the same time :)

Thanks a million for your help, Lucian!

Regards,
Nayan

On Dec 9, 3:51 am, Lucian Wischik <l...@wischik.c omwrote:

"Nayan" <cna...@gmail.c omwrote:

But i m not very good in C#. How can i get the value in a variable like
this by reference?[DllImport("user 32.dll")] static extern UInt32

GetWindowThread ProcessId(HWND hwnd, out UInt32 processId);

...
UInt32 pid;
UInt32 tid = GetWindowThread Processid(hwnd, out pid);

--
Lucian