kernel32 lib problems

Hi,

In a program I wrote, I used following function that calls the kernel32 lib
to check if a proces (a Dos program that writes a ascci-file) has terminated
(see below).

It works fine under Windows 95 but with NT4.0 id doesn't work.

What could be the problem.

Please help me,

Rik


Declare Function CloseHandle Lib "kernel32" (byval hObject as Long) as Long
Declare Function OpenProcess Lib "kernel32" (byval dwDesiredAccess as Long,
byval bInheritHandle as Long, byval dwProcessID as Long) as Long
Declare Function GetExitCodeProcess Lib "kernel32" (byval hProcess as Long,
lpExitCode as Long) as Long


public Function TestIfProcessStillAlive(ProcessID as Long) as Boolean
Dim Alive_ones as Long
Dim LoopTroughProcess as Long
Dim AlivePulse as Long
Dim hProcess as Long
Dim lngExitCode as Long

AlivePulse = 0
If ProcessID <> 0 then
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, false, ProcessID)
If hProcess <> 0 then
GetExitCodeProcess hProcess, lngExitCode
else 'process not found
TestIfProcessStillAlive = false
Exit Function
End If

'if you open a handle then you have to close it too
CloseHandle (hProcess)
else
TestIfProcessStillAlive = false
Exit Function
End If

If lngExitCode = 259 then
TestIfProcessStillAlive = true
else
If lngExitCode = 0 then TestIfProcessStillAlive = false
End If

End Function

[Ravi Kiran]

Hi,
I would guess 'Secuirity' problems!. NT is more stringent than '95.
You have not mentioned as to how your are starting the other process (DOS program). Check out ShellExecute (API)instead of just Shell (VB).
Also what you are trying to do can be accomplished by WaitforSingleObject API. and the process goes into a 'signaled' state when it terminates. This call is performance-tuned too.

Ravi

I was using shell. I'll try shellexecute.
By the way, where can I find some information about the API declarations?

Thanks,
Rik

Searching for the waitforsingleobject function,is the msdn library I found a solution. (Tip 173: http://msdn.microsoft.com/library/techart/msdn_msdn173.htm).

Thanks for the tip on the waitforsingleobject function.