using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PcgDrawR
{
    public partial class FormTestLic : Form
    {
        //[STAThread]
        //static void Main(string[] args)
        //{
        //    Application.EnableVisualStyles();
        //    Application.SetCompatibleTextRenderingDefault(false);
        //    Application.Run(new FormTestLic());
        //}

        public FormTestLic()
        {
            InitializeComponent();
            try
            { 
            Initialize();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void checkBoxF1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBoxF1.Checked)
            {
                // try to check out F1
                this.Cursor = Cursors.WaitCursor;

                StringBuilder str = new StringBuilder(200);

                int stat = CheckOut("GDFOcx", str);

                if (stat == 0)
                {
                    pictureBoxF1.BackColor = Color.Lime;
                    labelFlexMsgs.Text = str.ToString();
                }
                else
                {
                    pictureBoxF1.BackColor = Color.Red;
                    checkBoxF1.Checked = false;
                    labelFlexMsgs.Text = "GDFOcx not checked out.";
                }
                this.Cursor = Cursors.Default;
            }
            else
            {
                // check in F1
                FormTestLic.CheckIn("polygel");
                pictureBoxF1.BackColor = Color.LightGray;
                labelFlexMsgs.Text = "polygel checked in.";
            }
        }
        const string SIGMALIB = "FlexDll.dll";
        // prototypes from DLL
        //[DllImport("FlexDll.dll", CharSet = CharSet.Ansi)]
        [DllImport(SIGMALIB, EntryPoint = "Initialize", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern int Initialize();
        //[DllImport("FlexDll.dll", CharSet = CharSet.Ansi)]
        [DllImport(SIGMALIB, EntryPoint = "CheckOut", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern int CheckOut(String FeatureName, StringBuilder OutMsg);
        //[DllImport("FlexDll.dll", CharSet = CharSet.Ansi)]
        [DllImport(SIGMALIB, EntryPoint = "CheckIn", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern int CheckIn(String FeatureName);
        //[DllImport("FlexDll.dll", CharSet = CharSet.Ansi)]
        [DllImport(SIGMALIB, EntryPoint = "CleanUp", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern int CleanUp();
    }
}