Control.IsKeyLocked(Keys) Method
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.
Determines whether the CAPS LOCK, NUM LOCK, or SCROLL LOCK key is in effect.
public:
static bool IsKeyLocked(System::Windows::Forms::Keys keyVal);
public static bool IsKeyLocked (System.Windows.Forms.Keys keyVal);
static member IsKeyLocked : System.Windows.Forms.Keys -> bool
Public Shared Function IsKeyLocked (keyVal As Keys) As Boolean
Parameters
Returns
true
if the specified key or keys are in effect; otherwise, false
.
Exceptions
The keyVal
parameter refers to a key other than the CAPS LOCK, NUM LOCK, or SCROLL LOCK key.
Examples
The following code example displays a message box indicating whether the specified key (the Caps Lock key in this case) is in effect.
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Windows::Forms;
int main()
{
if (Control::IsKeyLocked( Keys::CapsLock )) {
MessageBox::Show( "The Caps Lock key is ON." );
}
else {
MessageBox::Show( "The Caps Lock key is OFF." );
}
}
using System;
using System.Windows.Forms;
public class CapsLockIndicator
{
public static void Main()
{
if (Control.IsKeyLocked(Keys.CapsLock)) {
MessageBox.Show("The Caps Lock key is ON.");
}
else {
MessageBox.Show("The Caps Lock key is OFF.");
}
}
}
' To compile and run this sample from the command line, proceed as follows:
' vbc controliskeylocked.vb /r:System.Windows.Forms.dll /r:System.dll
' /r:System.Data.dll /r:System.Drawing.dll
Imports System.Windows.Forms
Public Class CapsLockIndicator
Public Shared Sub Main()
if Control.IsKeyLocked(Keys.CapsLock) Then
MessageBox.Show("The Caps Lock key is ON.")
Else
MessageBox.Show("The Caps Lock key is OFF.")
End If
End Sub
End Class
Remarks
Use the IsKeyLocked property to determine whether the CAPS LOCK, NUM LOCK, or SCROLL LOCK keys are on, whether individually or in combination.
Applies to
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