如何使用VB.NET确定是否激活了Caps Lock？

这是我先前提出的问题的后续措施。

解决方案

回答

我不是VB.NET的专家，所以我只想到PInvoke：

Declare Function GetKeyState Lib "user32" 
   Alias "GetKeyState" (ByValnVirtKey As Int32) As Int16

Private Const VK_CAPSLOCK = &H14

If GetKeyState(VK_CAPSLOCK) = 1 Then ...

回答

http://msdn.microsoft.com/zh-CN/library/system.windows.forms.control.iskeylocked.aspx

Imports System
Imports System.Windows.Forms
Imports Microsoft.VisualBasic

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 'Main
End Class 'CapsLockIndicator

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.");
        }
    }
}