C # Create borderless, freeform form, move without border form

The interface layout is as follows:Add a PictureBox control to the form


have border form


No Border form


Code implementation:

    Public partial class Form2:form {public Form2 () {InitializeComponent (); #region Create borderless, any style form private void Form2_load (object sender, EventArgs e) {this.             TransparencyKey = Color.White; Sets the default transparent color of this. BackColor = this.          TransparencyKey; Sets the background color of the current form to transparent this.    FormBorderStyle = Formborderstyle.none;        Hide form Border} #endregion #region control the movement//using System.Runtime.InteropServices of the borderless form;        [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 Picturebox1_mousedown (object sender, MouseEventArgs e) {//const int wm_syscom            Mand = 0x0112;            The form moves int sc_move = 0xf010;            int htcaption = 0x0002;     ReleaseCapture ();       SendMessage (this.        Handle, Wm_syscommand, Sc_move + htcaption, 0);        }////constant//int wm_syscommand = 0x0112;        Change the size of the form//int wmsz_left = 0xf001;        int wmsz_right = 0xf002;        int wmsz_top = 0xf003;        int wmsz_topleft = 0xf004;        int wmsz_topright = 0xf005;        int wmsz_bottom = 0xf006;        int wmsz_bottomleft = 0xf007;        int wmsz_bottomright = 0xf008;        ReleaseCapture (); SendMessage (this.        Handle, Wm_syscommand, Wmsz_bottom, 0); SendMessage (this.        Handle, Wm_syscommand, wmsz_top, 0); #endregion}

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C # Create borderless, freeform form, move without border form