Many new mice have more than just a left and right button. Nowadays mice come with several additional buttons and a mouse wheel. You need to allow your application to take advantage of these new mice features. Additionally, you might need to know where the current location of the mouse is on a particular window, whether it is on the client area of the window (where your menus, toolbars, and controls are placed in the window), the nonclient area of the window (window border, title bar, close button, etc.), or the x and y coordinates of the mouse pointer.
There are seven
mouse events that exist in the
System.Windows.Forms.Form
class. These are, in the
order in which they occur:
MouseEnter
MouseMove
MouseHover
or MouseDown
or
MouseWheel
MouseUp
(if MouseDown
was the
previously raised event)
MouseLeave
Most of these events accept a MouseEventArgs
object that contains all the information about the mouse when the
event is raised. The MouseEventArgs
class contains
the following data:
Which button the user is acting on
The number of times the mouse button was clicked
The direction and speed of the mouse wheel
The x and y coordinate of the mouse pointer
Your code can make use of any one or more of these events on the
Form
class along with the
MouseEventArgs
object.
See Recipe 7.10; Subclassing & Hooking with Visual Basic by Stephen Teilhet (O’Reilly); see the “Form Class,” “MouseEventArgs Class,” “Control.MouseDown Event,” “Control.MouseEnter Event,” “Control.MouseHover Event,” “Control.MouseLeave Event,” “Control.MouseMove Event,” “Control.MouseWheel Event,” “Control.MouseUp Event,” and “Control.MouseMove Event” topics in the MSDN documentation.