Form1.cs

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

namespace xtremgym
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        frmRegistroDiario frmD = new frmRegistroDiario();

        //variables para mover form principal
        [DllImport("user32.DLL", EntryPoint = "ReleaseCapture")]
        private extern static void ReleaseCapture();
        [DllImport("user32.DLL", EntryPoint = "SendMessage")]
        private extern static void SendMessage(System.IntPtr hwnd, int wmsg, int wparm, int lparam);
        
        //Icono para cerrar aplicacion
        private void iconClose_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        //icono de maximizar
        int lx, ly;
        private void iconMaximizar_Click(object sender, EventArgs e)
        {
            //this.WindowState = FormWindowState.Maximized;
            lx = this.Location.X;
            ly = this.Location.Y;
            this.Size = Screen.PrimaryScreen.WorkingArea.Size;
            this.Location = Screen.PrimaryScreen.WorkingArea.Location;
            iconRestaurar.Visible = true;
            iconMaximizar.Visible = false;
        }
        //icono de restaurar
        private void iconRestaurar_Click(object sender, EventArgs e)
        {
            //this.WindowState = FormWindowState.Normal;
            this.Size = new Size(900, 600);
            this.Location = new Point(lx, ly);
            iconMaximizar.Visible = true;
            iconRestaurar.Visible = false;
        }

        //icono de minimizar
        private void iconMinimizar_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Minimized;
        }

        //Metodos para mover ventana
        private void barraTitulo_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(this.Handle, 0x112, 0xf012, 0);
        }
        //metodo para abrir un form hijo en un form padre
        private void AbrirFormInPanel(object FormHijo)
        {
            if (this.panelContainer.Controls.Count > 0)
                this.panelContainer.Controls.RemoveAt(0);
            Form fh = FormHijo as Form;
            fh.TopLevel = false;
            fh.Dock = DockStyle.Fill;
            this.panelContainer.Controls.Add(fh);
            fh.Show();
        }
        //abre form cliente en form padre
        private void btnClientes_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmClientes());
            }
            catch(Exception ex)
            {
                MessageBox.Show("Error: "+ex.ToString(),"Error inesperado", MessageBoxButtons.OK,MessageBoxIcon.Error);
            }
           

        }
        //abre form membresia en form padre
        private void btnMembresia_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmMembresia());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }
        //abre form reporte en form padre
        private void btnReporte_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmReportes());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }
        //abre form usuario en form padre
        private void btnUsuario_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmUsuarios());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }
        //abre form mantenimiento en form padre
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmMantenimientoDB());

            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                
                // Program.NomUse = Convert.ToString(Logear["UserName"]);
                lbEsclavo.Text = Program.NomUse;
           
                AbrirFormInPanel(new frmRegistroDiario());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }
        private void btnInicio_Click(object sender, EventArgs e)
        {
            try
            {
                FormAbierto();
                AbrirFormInPanel(new frmRegistroDiario());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.ToString(), "Error inesperado", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            
        }
        // muestra fecha y hora de la maquina
        private void HoraFEcha_Tick(object sender, EventArgs e)
        {
            lavelTime.Text =DateTime.Now.ToString("HH:mm:ss");
            lavelDate.Text =DateTime.Now.ToShortDateString();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            CNCaja Obcaja = new CNCaja();
            Obcaja.DineroInicial = Program.DineroInicial;
            Obcaja.DineroFinal = Program.DineroSuma + Program.DineroInicial;
            Obcaja.FechaInicial = Program.FechaInicio;
            Obcaja.IDUsuario = Program.IDUsuario;
            Obcaja.CierreCaja();
            MessageBox.Show(string.Format("Dinero ganado {0} -- Dinero Total {1} ", Program.DineroSuma, Program.DineroSuma + Program.DineroInicial));
        }

        // funcion para mover el form principal
        protected override void WndProc(ref Message msj)
        {
            const int CoordenandaWFP = 0x84;
            const int DesIzquierda = 16;
            const int DesDerecha = 17;
            if (msj.Msg == CoordenandaWFP)
            {
                int x = (int)(msj.LParam.ToInt64() & 0xFFFF);
                int y = (int)((msj.LParam.ToInt64() & 0xFFFF0000) >> 16);
                Point coordenadaArea = PointToClient(new Point(x, y));
                Size TamañoAreaForm = ClientSize;
                if (coordenadaArea.X >= TamañoAreaForm.Width -16 && coordenadaArea.Y >= TamañoAreaForm.Height-16 && TamañoAreaForm.Height >= 16)
                {
                    msj.Result = (IntPtr)(IsMirrored ? DesIzquierda : DesDerecha);
                    return;
                }
            }
            base.WndProc(ref msj);
        }

        private void button2_Click(object sender, EventArgs e)
        {

        }

        private void button3_Click(object sender, EventArgs e)
        {
            frmNusuarios frmn = new frmNusuarios();
            frmn.Show();
        }

        //metodo para cerrar form abierto
        private void FormAbierto()
        {
            foreach (Form frm in Application.OpenForms)
            {
                if ((frm.GetType() == typeof(frmRegistroDiario))||
                    (frm.GetType() == typeof(frmClientes))||
                    (frm.GetType() == typeof(frmMembresia))||
                    (frm.GetType() == typeof(frmReportes))||
                    (frm.GetType() == typeof(frmUsuarios))||
                    (frm.GetType() == typeof(frmMantenimientoDB)))
                {
                    frm.Close();
                    break;
                }
            }

        }
    }
}