CreateProcess iexplore -getting dwThreadId.how to check status 'Active' or not

[lalithaecw]

Expected Functionality.
1. Open iexplore instance with createprocess--Working
2. In next 'Status' command button to display the Status of iexplore ThreadId [Whether is active or not] - Not working with exact threadid. now just trying with Iframe
3. 'Close' Command button to close that particular Iexplore based on threadid. ->Now Closing all Internet explore or Explicitly setting threadid. Pls. see the below code

lthreadid = GetWindowThreadProcessId(lhWnd, lProcessId)
lCurrentThreadId = lthreadid
Based on lcurrentthreaid and checking active status and closing the particular iexplore. but I could not match the pinfo.dwthreadid with hwnd threadid. If tried the same flow with processId also still not showing matching value.Help please.