How to: Detect Navigation Keys
You can determine when a user presses any of the four directions on a Pocket PC navigation pad or its Return button. You can extend this example to detect keys on a Pocket PC keyboard accessory.
Example
The following example shows how to get the value of a key by overriding the OnKeyDown method and evaluating the KeyData property.
Protected Overrides Sub OnKeyDown(ByVal keyg As KeyEventArgs)
Select Case keyg.KeyData
Case Keys.Left
Label1.Text = "Left"
Case Keys.Right
Label1.Text = "Right"
Case Keys.Down
Label1.Text = "Down"
Case Keys.Up
Label1.Text = "Up"
Case Keys.Return
Label1.Text = "Return"
End Select
End Sub
protected override void OnKeyDown(KeyEventArgs keyg)
{
switch(keyg.KeyData)
{
case Keys.Left:
label1.Text = "Left";
break;
case Keys.Right:
label1.Text = "Right";
break;
case Keys.Down:
label1.Text = "Down";
break;
case Keys.Up:
label1.Text = "Up";
break;
case Keys.Return:
label1.Text = "Return";
break;
default:
break;
}
}
Compiling the Code
This example requires references to the following namespaces:
See Also
Tasks
How to: Use the HardwareButton Component