Borderless forms and background creation controls

1. No Border form

Minimizing the Maximize Close button does not necessarily have to be done with a button,

You can use the picture to write the event, plus the mouse move in the move out click to operate

mouseenter-events that occur when the mouse is moved in

private void Picturebox1_mouseenter (object sender, EventArgs e)        {            picturebox1.backgroundimage = Image.FromFile (Application.startuppath + "\ \". \\.. \\images\\btn_close_highlight.png ");        }

mouseleave-events that occur when the mouse is moved out

private void Picturebox1_mouseleave (object sender, EventArgs e)        {            picturebox1.backgroundimage = Image.FromFile (Application.startuppath + "\ \". \\.. \\images\\btn_close_disable.png ");        }

mousedown-events that occur when the mouse is pressed

The picture that is displayed when the mouse is pressed        private void Picturebox1_mousedown (object sender, MouseEventArgs e)        {            Picturebox1.backgroundimage = Image.FromFile (application.startuppath + "\ \". \\.. \\images\\btn_close_down.png ");        }

A borderless form sets the FormBorderStyle property to None

How to get the relative path of a picture:

Application.startuppath + "\ \". \\.. \\images\\btn_close_highlight.png "

The default borderless box is that you cannot drag the window and you can enter code to move the window:

Form Mobile API
[DllImport ("User32.dll")]
public static extern bool ReleaseCapture ();
[DllImport ("User32.dll")]
public static extern bool SendMessage (INTPTR hwnd, int wmsg, int wParam, int iparam);
public const int wm_syscommand = 0x0112;
public const int sc_move = 0xf010;
public const int htcaption = 0x0002;
[DllImport ("user32")]
private static extern int SendMessage (INTPTR hwnd, int wmsg, int wParam, IntPtr lParam);
Private Const int wm_setredraw = 0xB;

private void Form1_mousedown (object sender, MouseEventArgs e)
{
if (this. WindowState = = formwindowstate.normal)
{
ReleaseCapture ();
SendMessage (this. Handle, Wm_syscommand, Sc_move + htcaption, 0);
}
}

Let the form have a shadow, lower right shadow (no four-sided shadow is found)

Shadow on both sides
Private Const int Cs_dropshadow = 0x20000;
Private Const int Gcl_style = (-26);

[DllImport ("user32.dll", CharSet = CharSet.Auto)]
public static extern int Setclasslong (INTPTR hwnd, int nIndex, int dwnewlong);
[DllImport ("user32.dll", CharSet = CharSet.Auto)]
public static extern int Getclasslong (INTPTR hwnd, int nIndex);

Timer Control:

----timer is a thread that can access objects by default across threads

There are two properties commonly used:

Enabled-whether this control is enabled

--timer1. Enabled=false; not available
--timer1. Enabled=true; available

Interval-interval time, milliseconds

-------------

Creating controls

PictureBox p = new PictureBox ();//Create picture control, instantiate picture control            //Set Picture
            P.backgroundimage = Image.FromFile (Application.startuppath + "\\dota_img5.jpg");            P.backgroundimagelayout = Imagelayout.stretch;            TextBox TB = new TextBox ();//Create a TextBox control, instantiate            FLOWLAYOUTPANEL1.CONTROLS.ADD (p);//Put in            a collection of streaming layouts FLOWLAYOUTPANEL1.CONTROLS.ADD (TB);


Change properties:

foreach (Control ct in flowlayoutpanel1.controls)            {                if (CT is TextBox)                {                    (textbox) CT). Text = "123123";                               }              }

Borderless forms and background creation controls