Creating and Using Windows.Forms inside Threads

[ennrike]

Hi,

I am just wondering something related to safety:

Is it safe to create Windows forms from separated Threads (System.Threading) ?

The Thread is created from a UserControl (from a click button for example).

The point is that when the thread is started I need to show some "custom forms" (Windows.Forms) that are created inside the thread in order to promp to the user the -OK and -CANCEL options in order to take a desition from there.

The thread is a single thread apartment (STA)

Example:

namespace ThreadTestandForms
{
    public partial class FormGUI : UserControl
    {

        private void button2_Click(object sender, EventArgs e)
        {
             //WANT TO KEEP GUI RESPONSIVE.
             //WANT TO KEEP GUI RESPONSIVE.

            Thread ThreadSendParts;
            ThreadSendParts = new Thread(new ThreadStart(RunsOnThread));
            ThreadSendParts.SetApartmentState(ApartmentState.STA);

            //I want to use a good priority.
            ThreadSendParts.Priority = ThreadPriority.Highest;
            
            ThreadSendParts.Start();

            FrmSentPrtPgres.ShowDialog();  //I need to show a modal dialog after running the thread.
        }


        private void RunsOnThread()
        {
            for (int i = 0; i <= 100; i += 10) //EMULATE VERY HEAVY PROCESS
            {
                Thread.Sleep(200); //EMULATE VERY HEAVY PROCESS


                //This method uses BeginInvoke and InvokeRequired
                ShowProgress("My Progress Status", i);

                //Example of doing some custom form with some custom conditions.
                FrmMyMessage MyForm = new FrmMyMessage("Do you want do this or that?");

                //show message stop exectuting until user takes a decision.
                DialogResult DLRes = MyForm.ShowDialog();

                if (DLRes == DialogResult.OK)
                {
                    //do something this
                }
                else
                {
                    //do something that
                }
            }

            //Execute some extra things when finishing the thread.
            //This method uses BeginInvoke and InvokeRequired
            ThreadCompleted();
        }
    }  
}

Regards,