Form Details

Objects name

Form:frmProcess

Select list box:     lstProcess

Process currently running list box: lstAll

Check button:   btnCheck

End Process button: btnKill

Check All button: btnCheckAll

Exit button: btnExit

Form code with Explanation 

//Code for btnExit click event.
      private void btnExit_Click(object sender, EventArgs e)
        {
//Close Application
            this.Close();
        }
 
//Code for btnCheck click event. This will check for the selected process in the select list box(lstProcess)
        private void btnCheck_Click(object sender, EventArgs e)
        {
            Boolean found = false; //store the status for record found or not
            string selItem = Convert.ToString(lstProcess.SelectedItem);//storing the selected item from the list box in selItem
            selItem = selItem.ToUpper(); 
//converting value of selItem toupper case.
System.Diagnostics.Process[] myProcesses = System.Diagnostics.Process.GetProcesses();
//assigning running  process in array
// loop to check all running process
            for (int i = 0; i < myProcesses.Length; i++)
            {   
//checking whether selected process is running or not. If running then value of found will be assigned //‘true’             
                if (selItem == myProcesses[i].ProcessName.ToUpper())
                    found = true;
            }
            if (found)
                MessageBox.Show(selItem + " is running !!!");
            else
                MessageBox.Show(selItem + " is not running !!!");
            
        }
 
//code for button btnCheckAll. This will show all the running processes
//in list box ‘lstAll’
        private void btnCheckAll_Click(object sender, EventArgs e)
        {
            lstAll.Items.Clear(); //this will clear the list box.
System.Diagnostics.Process[] myProcesses = System.Diagnostics.Process.GetProcesses();      
//fetching all running processes and storing in myProcess array.
//loop for adding all running process in list box.
            for (int i = 0; i < myProcesses.Length; i++)
                lstAll.Items.Add(myProcesses[i].ProcessName);
slblProcess.Text = "No. of Processes running: "+myProcesses.Length;      //displaying no. of running processes in status bar.
            btnKill.Enabled = true;
            lstAll.SetSelected(0, true);
        }
 
        private void frmProcess_Load(object sender, EventArgs e)
        {
            this.CenterToScreen();
            lstProcess.SetSelected(0, true);
        }
 
 
//code for btnKill click event.
        private void btnKill_Click(object sender, EventArgs e)
        {            
            string selItem = Convert.ToString(lstAll.SelectedItem);
            string process;            
            selItem = selItem.ToUpper();
System.Diagnostics.Process[] myProcesses = System.Diagnostics.Process.GetProcesses();
//loop to check for running process selecter from lstAll list box.
            for (int i = 0; i < myProcesses.Length; i++)
            {
                process = myProcesses[i].ProcessName;
                process = process.ToUpper();
                try
                {
                    if (selItem == process)
                        myProcesses[i].Kill();
//killing process selected from lstAll list box
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
            
        }

Screen shots