<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<TargetFramework>net8.0-windows</TargetFramework>
		<UseWindowsForms>true</UseWindowsForms>
		<ImplicitUsings>enable</ImplicitUsings>
		<Nullable>enable</Nullable>
		<EnableDynamicLoading>true</EnableDynamicLoading>
		<Platforms>AnyCPU;x64</Platforms>
	</PropertyGroup>

	<ItemGroup>
	  <Reference Include="CSiAPIv1">
	    <HintPath>..\..\..\..\..\API\CSI.API\bin\Debug\CSiAPIv1.dll</HintPath>
		<Private>false</Private>
		<ExcludeAssets>runtime</ExcludeAssets>
	  </Reference>
	</ItemGroup>

</Project>

using CSiAPIv1;

namespace CSiNET8PluginExample1
{
    public partial class Form1 : Form
    {

        protected cSapModel _sapModel;
        protected cPluginCallback _pluginCallback;

        public Form1()
        {
            InitializeComponent();
            FormClosing += Form1_FormClosing;
        }

        public void SetSapModel(ref cSapModel inSapModel, ref cPluginCallback inPluginCallback)
        {
            _sapModel = inSapModel;
            _pluginCallback = inPluginCallback;

            richTextBox1.Text = "Hello CSI Friends";
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            // It is very important to call _pluginCallback.Finish(0) when the form closes, !!!
            // otherwise, the CSI program will wait and be hung !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
            _pluginCallback.Finish(0);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                CreateStructure(richTextBox1.Text);
            }
            catch (Exception ex)
            {
                MessageBox.Show("The following error terminated the Plugin:" + Environment.NewLine + ex.Message);
            }
            finally
            {
                this.Close();
            }
        }

        public void CreateStructure(string text)
        {
            int CallResult;
            int i;
            string FrameName = "FrameName";

            var aVectorFont = new cVectorFont();
            double CharHeight = 200.0;
            var HAlignment = cVectorFont.TextAlignment.kTA_HLeft;
            var VAlignment = cVectorFont.TextAlignment.kTA_VTop;
            double[] textX = new double[1], textY = new double[1];
            int NumPts;

            // test for exception handling
            if (string.Equals(text, "crash", StringComparison.InvariantCultureIgnoreCase))
            {
                textX[99] = 0; // out of bounds
            }

            aVectorFont.FillTextVertices(text.ToUpper(), CharHeight, HAlignment, VAlignment, ref textX, ref textY);
            NumPts = textX.Length;

            CallResult = _sapModel.InitializeNewModel();
            CallResult = _sapModel.File.NewBlank();
            for (i = 0; i < NumPts - 2; i++)
            {
                FrameName = "FrameName" + (i / 2).ToString();
                CallResult = _sapModel.FrameObj.AddByCoord(textX[i], textY[i], 0, textX[i + 1], textY[i + 1], 0, ref FrameName);
                i++;
            }

            _sapModel.View.RefreshView(0, false);
        }

    }
}

using CSiAPIv1;

namespace CSiNET8PluginExample1
{
    // Implementing the cPluginContract interface is not required, however
    // it is recommended to ensure that the required cPlugin methods are created correctly.
    // Do not implement the Info or Main methods explicitly,
    // i.e. their method signatures are correct as is
    public class cPlugin : cPluginContract
    {
        private static string _modality = "Non-Modal";

        private static string _versionString = "2.0";

        public int Info(ref string Text)
        {
            try
            {
                Text = "This plugin is supplied by Computers and Structures, Inc., " +
                       "as a simple example for developers of new plugins for CSI products. " +
                       "It starts a new blank model, then converts a line of text into " +
                       "frame objects and adds them to the model. If you enter the " +
                       "text \"crash\", an error will be generated for testing purposes. " +
                       "Version " + _versionString;
            }
            catch (Exception)
            {
            }

            return 0;
        }

        public void Main(ref cSapModel sapModel, ref cPluginCallback pluginCallback)
        {
            var aForm = new Form1();

            try
            {
                aForm.SetSapModel(ref sapModel, ref pluginCallback);

                if (string.Compare(_modality, "Non-Modal", true) == 0)
                {
                    // Non-modal form, allows graphics refresh operations in CSI program, 
                    // but Main will return to CSI program before the form is closed.
                    aForm.Show();
                }
                else
                {
                    // Modal form, will not return to CSI program until form is closed,
                    // but may cause errors when refreshing the view.
                    aForm.ShowDialog();
                }

                // It is very important to call pluginCallback.Finish(iError) when the form closes, !!!
                // otherwise, the CSI program will wait and be hung !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
                // This must be done inside the closing event for the form itself, not here !!!!!!!!!!!

                // If you simply have algorithmic code here without any forms, 
                // then call pluginCallback.Finish(iError) here before returning to the CSI program

                // If your code will run for more than a few seconds, you should exercise
                // the Windows messaging loop to keep the program responsive. You may 
                // also want to provide an opportunity for the user to cancel operations.

            }
            catch (Exception ex)
            {
                MessageBox.Show("The following error terminated the plugin:" + Environment.NewLine + ex.Message);

                // call Finish to inform the CSI program that the plugin has terminated
                try
                {
                    pluginCallback.Finish(1);
                }
                catch (Exception)
                {
                }
            }
        }
    }
}