Monitoring Unmanaged program using .net

Question

I have a exe program written using c++,
I want to perform some actions when that exe is opened, closed or minimized
I wonder whether this kind of functionality is possible using c#.net?

Answer 1

you can send windows message. you also control on the window by using pipe name

A simple message pump looks like this:
[Serializable, StructLayout(LayoutKind.Sequential)]
public struct MSG
{
    public IntPtr hwnd;
    public int message;
    public IntPtr wParam;
    public IntPtr lParam;
    public int time;
    public int pt_x;
    public int pt_y;
}

[DllImport("user32.dll", CharSet = CharSet.Ansi)]
public static extern bool GetMessage([In, Out] ref MSG msg, IntPtr hWnd, int MsgFilterMin,  int uMsgFilterMax);

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr DispatchMessage([In] ref MSG msg);


[DllImport("user32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern uint RegisterWindowMessage(string lpString);

[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);


    // #1
    MSG msg = new MSG();
    while (GetMessage(ref msg, IntPtr.Zero, 0, 0))
    {
        DispatchMessage(ref msg);
    }

    // #2
    uint UWM_UART_CTRL_TRS = Win32Api.RegisterWindowMessage("BT_UARTCTRL_TRANSFER");
    Win32Api.SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, (IntPtr)0, (IntPtr)0);

    // #3
    uint UWM_UART_CTRL_TRS = Win32Api.RegisterWindowMessage("BT_UARTCTRL_TRANSFER");
    Win32Api.SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, (IntPtr)1, (IntPtr)0);

Answer 2

Native .NET Process class has a functionality for an event fired when a process is closed.

Also process monitoring in C# is partially discussed in this post.

Considering this, you'll have to use Windows Management Instrumentation to track wide range of specific process events.