//Optional Win32.GetWindowThreadProcessId(GetForegroundWindow(),out ProcessID)

static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);

Private Shared Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, _

    ''' <param name="lpdwProcessId">A pointer to a variable that receives the process identifier. If this parameter is not NULL, GetWindowThreadProcessId copies the identifier of the process to the variable; otherwise, it does not. </param>

    Private Declare Auto Function GetWindowThreadProcessId Lib "user32.dll" (ByVal hwnd As IntPtr, _

  GetWindowThreadProcessId(lngAccessHwnd, lngPid)

    Public Declare Auto Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As IntPtr, ByRef lpdwProcessId As IntPtr) As IntPtr

        GetWindowThreadProcessId(hOwner, iProcessID)

IntPtr pID = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero);

GetWindowThreadProcessId returns the id of the thread that created the target window. To get the process id of a window, use the first c# signature above, and:

int threadID = GetWindowThreadProcessId(hWnd, out processID);

static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);

Private Shared Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, _

    ''' <param name="lpdwProcessId">A pointer to a variable that receives the process identifier. If this parameter is not NULL, GetWindowThreadProcessId copies the identifier of the process to the variable; otherwise, it does not. </param>

    Private Declare Auto Function GetWindowThreadProcessId Lib "user32.dll" (ByVal hwnd As IntPtr, _

  GetWindowThreadProcessId(lngAccessHwnd, lngPid)

    Public Declare Auto Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As IntPtr, ByRef lpdwProcessId As IntPtr) As IntPtr

        GetWindowThreadProcessId(hOwner, iProcessID)

IntPtr pID = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero);

GetWindowThreadProcessId returns the id of the thread that created the target window. To get the process id of a window, use the first c# signature above, and:

int threadID = GetWindowThreadProcessId(hWnd, out processID);

    private static extern int GetWindowThreadProcessId(

        StatusBar.GetWindowThreadProcessId(this._handle, out pid);

    uint foreThread = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero);

    GetWindowThreadProcessId((IntPtr)handle, out ProcessID);

    static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

GetWindowThreadProcessId(hWnd, out pid);