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C#

C# 1

From the Windows Start menu, open "CONTEC API-TOOL" → "WDM Configuration" (or simply "Configuration Tool").

Select a registered demo device (e.g., DIO000) and press the "Diagnostic" button.

A screen with a row of "Input (IN)" and "Output (OUT)" lamps and buttons will appear.

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    using System;
    using System.Windows.Forms;


    // In some cases, you might need to add the "Cdio.cs" file to your project instead of a DLL.
    using CdioCs;

    namespace ContecController
    {
        public partial class Form1 : Form
        {
            short Id = -1; // Initialize with an invalid ID

            // [Check Required] The device name registered in the Device Manager (API-TOOL configuration)
            string DeviceName = "DIO000"; 

            public Form1()
            {
                InitializeComponent();
            }

            private void Form1_Load(object sender, EventArgs e)
            {
                int ret;
                // Device initialization
                ret = Cdio.DioInit(DeviceName, out Id);

                if (ret != 0) // Non-zero indicates an error
                {
                    string errorMsg = "";
                    Cdio.DioGetErrorString(ret, out errorMsg); // Retrieve error details as a string

                    MessageBox.Show($"Initialization failed.\nError Code: {ret}\nDetail: {errorMsg}\n\nPlease check if the device name is correct.");

                    // Disable buttons if initialization fails
                    btnSignalOn.Enabled = false;
                    btnSignalOff.Enabled = false;
                }
                else
                {
                    labelStatus.Text = "Ready";
                }
            }

            // Signal ON Button
            private void btnSignalOn_Click(object sender, EventArgs e)
            {
                if (Id == -1) return;

                // Set Output Port 0, Bit 0 to 1 (ON)
                int ret = Cdio.DioOutBit(Id, 0, 0, 1);

                if (ret != 0) ShowError(ret);
                else labelStatus.Text = "Port0-Bit0 : ON";
            }

            // Signal OFF Button
            private void btnSignalOff_Click(object sender, EventArgs e)
            {
                if (Id == -1) return;

                // Set Output Port 0, Bit 0 to 0 (OFF)
                int ret = Cdio.DioOutBit(Id, 0, 0, 0);

                if (ret != 0) ShowError(ret);
                else labelStatus.Text = "Port0-Bit0 : OFF";
            }

            // Cleanup on exit
            private void Form1_FormClosed(object sender, FormClosedEventArgs e)
            {
                if (Id != -1)
                {
                    // Release the device
                    Cdio.DioExit(Id);
                }
            }

            // Method for displaying errors
            private void ShowError(int errorCode)
            {
                string errorMsg = "";
                Cdio.DioGetErrorString(errorCode, out errorMsg);
                MessageBox.Show($"An error occurred.\nCode: {errorCode}\nDetail: {errorMsg}");
            }
        }
    }