C # Three ways to move a borderless form

1. Rewrite WndProc

protected Override voidWndProc (refMessage m) {               Const intWm_nchittest =0x84; Const intHtclient =0x01; Const intHtcaption =0x02; if(M.msg = =wm_nchittest) {                 This. Defwndproc (refm); if(M.result.toint32 () = =htclient) M.result=NewIntPtr (htcaption); Else                    Base. WndProc (refm); }        Else        {                Base. WndProc (refm); }}

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2. Create a message

Private Const intWm_nclbuttondown =0x00A1;Private Const intWm_nchittest =0x84;Private Const intHt_caption =0x2;Private Const intHt_client =0x1;Private voidPicturebox1_mousedown (Objectsender, MouseEventArgs e) {    //This . Capture = false;Picturebox1.capture =false; Message msg=message.create (Handle, Wm_nclbuttondown, (INTPTR) ht_caption, IntPtr.Zero); WndProc (refmsg); } 

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3. Calling API Code

usingSystem.Runtime.InteropServices; [DllImport ("user32.dll")]  Public Static extern BOOLreleasecapture (); [DllImport ("user32.dll")] Public Static extern BOOLSendMessage (INTPTR hwnd,intWmsg,intWParam,intLParam);  Public Const intWm_syscommand =0x0112;  Public Const intSc_move =0xf010; Public Const intHtcaption =0x0002; //Add the following code to the form's _mousedown:such as:Private voidForm1_mousedown (Objectsender, System.Windows.Forms.MouseEventArgs e) {releasecapture (); SendMessage ( This. Handle, Wm_syscommand, Sc_move + htcaption,0);}

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C # Three ways to move a borderless form