Maximize, minimize, restore, close and move the WinForm form form of C ＃

C# And winform Maximization of forms 、 To minimize the 、 Restore 、 Close and move the form

Doing it winform When beautifying the form interface , Generally, the FormBorderStyle Property changed to None, Then the form will become a blank “ White paper ”, Then design the interface according to your own needs . Close on the form 、 To minimize the 、 Maximize buttons need to be added by yourself , The code to realize its function is as follows :

        // Closing of forms 
        private void btnClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }
 
        // Minimize the form 
        private void btnMin_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Minimized;
        }
 
        // Form maximization and restoration 
        private void btnMax_Click(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Maximized)
            {
                this.WindowState = FormWindowState.Normal;
                Image backImage = Resources. Maximize ;// Here, a good picture is added to the resource library when the picture is called    Need to add reference  using CalibrationAndMatching.Properties;
                btn_Max.BackgroundImage = backImage;
            }
            else
            {
                this.WindowState = FormWindowState.Maximized;
                Image backImage = Resources. Restore ;
                btn_Max.BackgroundImage = backImage;
            }
        }

After clicking the maximize form button, you will find that the form becomes larger and covers the whole screen , Cover the taskbar , The solution to this problem is as follows ：

        // On the window Load Events 
        private void Form1_Load(object sender, EventArgs e)
        {
            this.MaximizedBounds = Screen.PrimaryScreen.WorkingArea;
        }

  To realize the dragging of forms , Put the following code into the MouseDown In the event ：

        // call API function    Add reference using System.Runtime.InteropServices;
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
 
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
 
        private void FrmMain_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Clicks == 1)
            {
                // The window moves 
                if (e.Button == MouseButtons.Left)
                {
                    ReleaseCapture(); // Release mouse capture 
                    // Send the left click message to this form ( The title bar )
                    SendMessage(this.Handle, 0xA1, 0x02, 0);
                }
            }
        }