Control.IsKeyLocked(Keys) 方法

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

参数

返回

true 如果指定的键或键有效，则为 ;否则，为 false.

例外

示例

下面的代码示例显示一个消息框，指示指定的键（在这种情况下，Caps Lock 键）是否有效。

#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

注解

IsKeyLocked(Keys)使用此方法可确定 CAPS LOCK、NUM LOCK 或 SCROLL LOCK 键是单独打开还是组合打开。