转自：

本文实例讲述了C#检查键盘大小写锁定状态的方法。分享给大家供大家参考。具体分析如下：

1、命名空间：

1	using System.Runtime.InteropServices;

2、导入方法

1 2	[DllImport("user32.dll", EntryPoint = "GetKeyboardState")] public static extern int GetKeyboardState(byte[] pbKeyState);

3、大小写状态

1 2 3 4 5 6 7 8 9

public static bool CapsLockStatus { get { byte[] bs = new byte[256]; GetKeyboardState(bs); return (bs[0x14] == 1); } }

4、引用，此部分根据你的需要来修改

1 2 3 4 5 6 7

private void button2_Click(object sender, EventArgs e) { if (CapsLockStatus == true) MessageBox.Show("键盘处于大写锁定状态！"); else MessageBox.Show("键盘处于小写状态！"); }

5.键盘VK键值表---完整

键盘VK键值列表
/* Virtual Keys, Standard Set*/
VK_LBUTTON                                      0x01
VK_RBUTTON                                     0x02
VK_CANCEL                                    0x03
VK_MBUTTON                                     0x04
#define VK_LBUTTON        0x01    //鼠标左键
#define VK_RBUTTON        0x02    //鼠标右键 
#define VK_CANCEL         0x03    //Ctrl + Break
#define VK_MBUTTON        0x04    //鼠标中键/* NOT contiguous with L & RBUTTON */
#define VK_BACK           0x08   //Backspace 键
#define VK_TAB            0x09   //Tab 键
#define VK_CLEAR          0x0C
#define VK_RETURN         0x0D   //回车键
#define VK_SHIFT          0x10
#define VK_CONTROL        0x11
#define VK_MENU           0x12   //Alt 键
#define VK_PAUSE          0x13
#define VK_CAPITAL        0x14   //Caps Lock 键 
#define VK_KANA           0x15
#define VK_HANGEUL        0x15 /* old name - should be here for compatibility */
#define VK_HANGUL         0x15
#define VK_JUNJA          0x17
#define VK_FINAL          0x18
#define VK_HANJA          0x19
#define VK_KANJI          0x19
#define VK_ESCAPE         0x1B   //Esc 键
#define VK_CONVERT        0x1C
#define VK_NONCONVERT     0x1D
#define VK_ACCEPT         0x1E
#define VK_MODECHANGE     0x1F
#define VK_SPACE          0x20   //空格
#define VK_PRIOR          0x21   //Page Up 键
#define VK_NEXT           0x22   //Page Down 键
#define VK_END            0x23   //End 键
#define VK_HOME           0x24   //Home 键
#define VK_LEFT           0x25  /*方向键*/
#define VK_UP             0x26
#define VK_RIGHT          0x27
#define VK_DOWN           0x28
#define VK_SELECT         0x29
#define VK_PRINT          0x2A
#define VK_EXECUTE        0x2B
#define VK_SNAPSHOT       0x2C   //Print Screen 键
#define VK_INSERT         0x2D  //Insert键
#define VK_DELETE         0x2E  //Delete键
#define VK_HELP           0x2F
/* VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39) */
/* VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A) */
#define VK_LWIN           0x5B //左WinKey(104键盘才有) 
#define VK_RWIN           0x5C //右WinKey(104键盘才有)
#define VK_APPS           0x5D //AppsKey(104键盘才有) 
#define VK_NUMPAD0        0x60 //小键盘0-9
#define VK_NUMPAD1        0x61
#define VK_NUMPAD2        0x62
#define VK_NUMPAD3        0x63
#define VK_NUMPAD4        0x64
#define VK_NUMPAD5        0x65
#define VK_NUMPAD6        0x66
#define VK_NUMPAD7        0x67
#define VK_NUMPAD8        0x68
#define VK_NUMPAD9        0x69
#define VK_MULTIPLY       0x6A //乘
#define VK_ADD            0x6B //加
#define VK_SEPARATOR      0x6C //除
#define VK_SUBTRACT       0x6D //减
#define VK_DECIMAL        0x6E //小数点
#define VK_DIVIDE         0x6F 
#define VK_F1             0x70 //功能键F1-F24
#define VK_F2             0x71
#define VK_F3             0x72
#define VK_F4             0x73
#define VK_F5             0x74
#define VK_F6             0x75
#define VK_F7             0x76
#define VK_F8             0x77
#define VK_F9             0x78
#define VK_F10            0x79
#define VK_F11            0x7A
#define VK_F12            0x7B
#define VK_F13            0x7C
#define VK_F14            0x7D
#define VK_F15            0x7E
#define VK_F16            0x7F
#define VK_F17            0x80
#define VK_F18            0x81
#define VK_F19            0x82
#define VK_F20            0x83
#define VK_F21            0x84
#define VK_F22            0x85
#define VK_F23            0x86
#define VK_F24            0x87
#define VK_NUMLOCK        0x90 //Num Lock 键
#define VK_SCROLL         0x91 //Scroll Lock 键
/*
* VK_L* & VK_R* - left and right Alt, Ctrl and Shift virtual keys.
* Used only as parameters to GetAsyncKeyState() and GetKeyState().
* No other API or message will distinguish left and right keys in this way.
*/
#define VK_LSHIFT          0xA0
#define VK_RSHIFT          0xA1
#define VK_LCONTROL        0xA2
#define VK_RCONTROL        0xA3
#define VK_LMENU           0xA4
#define VK_RMENU           0xA5
#if(WINVER >= 0x0400)
#define VK_PROCESSKEY      0xE5
#endif /* WINVER >= 0x0400 */
#define VK_ATTN            0xF6
#define VK_CRSEL           0xF7
#define VK_EXSEL           0xF8
#define VK_EREOF           0xF9
#define VK_PLAY            0xFA
#define VK_ZOOM            0xFB
#define VK_NONAME          0xFC
#define VK_PA1             0xFD
#define VK_OEM_CLEAR       0xFE