Mouse.WheelExists 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 Boolean that indicates if the mouse has a scroll wheel.
public:
property bool WheelExists { bool get(); };public bool WheelExists { get; }member this.WheelExists : boolPublic ReadOnly Property WheelExists As BooleanProperty Value
A Boolean with value True if the mouse has a scroll wheel; otherwise False.
Exceptions
The computer has no mouse installed.
Examples
This example uses the My.Computer.Mouse.WheelExists property to determine if the mouse has a scroll wheel and 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
The My.Computer.Mouse.WheelExists property provides functionality similar to the MouseWheelPresent property.
You should check the value of the My.Computer.Mouse.WheelExists property before attempting to access the WheelScrollLines property, which throws an exception if the mouse does not have a scroll wheel.
The My.Computer.Mouse.WheelExists 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 |
