WinForm Mouse wheel Events

1 #regionLoad when entering form2 3  Publicformalarminfoquery ()4 {5 InitializeComponent ();6Picturebox1.imagelocation ="f:\\1.jpg";7 8           This. MouseWheel + =NewSystem.Windows.Forms.MouseEventHandler ( This. Panel1_mousewheel);9          //determine if a mouse with a scroll wheel is installedTen     //SystemInformation.MouseWheelPresent.ToString (); One     //gets the number of rows that the mouse wheel obtains when scrolling A     //SystemInformation.MouseWheelScrollLines.ToString (); -     //determine if the operating system supports wheel mouse -     //SystemInformation.NativeMouseWheelSupport.ToString (); the } -  - #endregion

1 Private voidPanel1_mousewheel (Objectsender, System.Windows.Forms.MouseEventArgs e)2 {3MessageBox.Show ("scrolling events have been snapped");4System.Drawing.Size T =picturebox1.size;5T.width + =E.delta;6T.height + =E.delta;7Picturebox1.width =T.width;8Picturebox1.height =T.height;9}

Here is the mouse control music player Volume event

1          PublicForm1 ()2         {3 InitializeComponent ();4              This. Btnjin. MouseWheel + =NewMouseEventHandler (btnjin_mousewheel);5 6         }7         intm1= -;8         Private voidBtnjin_mousewheel (Objectsender, System.Windows.Forms.MouseEventArgs e)9         {Ten             if(m1>=0&&m1<= -) One             { AM1 + = E.delta/ -; -                 if(M1 > -) -                 { theM1 = -; -                 } -                 Else if(M1 <0) -                 { +M1 =0; -                 } +Lblvol. Width = ( -/ -) * M1/5; AMusic.settings.volume =M1; at             } -              -  -         } -  -         Private voidBtnjin_mouseenter (Objectsender, EventArgs e) in         { -Panel2. Visible =true; to         } +  -         Private voidBtnjin_mouseleave (Objectsender, EventArgs e) the         { *Panel2. Visible =false; $}

WinForm Mouse wheel Events