Pass arguments to running application

Question

I am making an image uploader (upload image to image hosting website) and I'm having some issues passing an argument (image location to an already running application)

First of all let's say MyApp.exe is always running
Whenever I right click on an image I have added an item in the default windows context menu that says "Upload image".
When that's clicked it needs to pass the location to the already running application.

My program.cs:

static class Program
{
    [DllImport("user32.dll")]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

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

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

    [STAThread]
    static void Main(params string[] Arguments)
    {
        if (Arguments.Length > 0)
        {
    //This means that the the upload item in the context menu is clicked
    //Here the method "uploadImage(string location)"
    //of the running application must be ran
        }
        else
        {
    //just start the application
            Application.Run(new ControlPanel());
        }
    }
}

Note that the ControlPanel class doesn't have a visible form, only a tray icon is present since a form is not needed.

Could I get any help on how to do this?

Pass arguments to running application

5 Answers