Mouse.WheelScrollLines Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets a number that indicates how much to scroll when the mouse wheel is rotated one notch.
public:
property int WheelScrollLines { int get(); };
public int WheelScrollLines { get; }
member this.WheelScrollLines : int
Public ReadOnly Property WheelScrollLines As Integer
Property Value
An Integer
that indicates how much to scroll when the mouse wheel is rotated one notch. A positive value indicates scrolling by that number of lines, while a negative value indicates scrolling by one screen at a time.
Exceptions
The mouse has no scroll wheel.
Examples
This example determines if the mouse has a scroll wheel and uses the My.Computer.Mouse.WheelExists
property to determine how much to scroll when the mouse wheel is rotated.
If My.Computer.Mouse.WheelExists Then
Dim lines As Integer = My.Computer.Mouse.WheelScrollLines
If lines > 0 Then
MsgBox("Application scrolls " &
lines & " line(s) for each wheel turn.")
Else
MsgBox("Application scrolls " &
(-lines) & " page(s) for each wheel turn.")
End If
Else
MsgBox("Mouse has no scroll wheel.")
End If
Remarks
You can use this property to determine how many lines to scroll up or down in a multi-line control that has a scroll bar.
The My.Computer.Mouse.WheelScrollLines
property provides functionality similar to the MouseWheelScrollLines property.
Because this property throws an exception if the mouse does not have a scroll wheel, you should make sure a mouse has a scroll wheel by checking the My.Computer.Mouse.WheelExists
property.
This property provides information about the computer that runs the code.
Availability by Project Type
Project type | Available |
---|---|
Windows Application | Yes |
Class Library | Yes |
Console Application | Yes |
Windows Control Library | Yes |
Web Control Library | No |
Windows Service | Yes |
Web Site | No |