GetProcessID trouble.

[Jens]

hello there, this forum seems somewhat deserted, but im trying out anyways

string convStr = listBox1.SelectedItem.ToString();
IntPtr hWnd = (IntPtr)Convert.ToInt32(convStr);
label1.Text = GetProcessID(hWnd).ToString();

is my problem, as far as i found out i need the intptr convertion for changing the input from the listbox into the handle hWnd, and afterwards print it to the lable, but i somehow cant figure out how to do it, i get an error about the input string being a wrong format, i know i could use the FindWindow using pinvoke, but the point is only knowing the process handle not the process id nor window handle, hope to see some response =)

[Apoc]

Firstly, GetProcessID doesn't use an IntPtr, just a plain old int.

Now, that isn't a whole lot of info to really be of help in solving your problem. When exactly are you trying to do?

[Jens]

i know it returns an int, but im trying to pick a process from the processlist (listbox) grabbing the process handle and getting the processID from that handle, mainly its for learning, i experiment with all sorts of things :P

[DllImport("kernel32.dll")]
static extern int GetProcessID(IntPtr hWnd);


is what i used for importing it, might have something wrong with it, im not that advanced yet, still learning

[Apoc]

Hah that explains it. Don't use DllImports for process work. Use the System.Diagnostics namespace. (More importantly, the Process class within that namespace)

Quick little snippet of how to grab the entire list of processes from the current machine.

        public Dictionary<Process, int> ProcessDictionary;
        public void GetProcesses()
        {
            if (ProcessDictionary == null)
            {
                 ProcessDictionary = new Dictionary<Process, int>();
            }
            Process[] processes = Process.GetProcesses(Environment.MachineName);
            foreach (var process in processes)
            {
                ProcessDictionary.Add(process, process.Id);
            }
         }