【转】C#检查键盘大小写锁定状态的方法

客官°小女子只卖身不卖艺 2022-10-06 00:33 164阅读 0赞

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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：

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   <td> <p>1</p> </td> 
   <td> <p><code>using</code> <code>System.Runtime.InteropServices;</code></p> </td> 
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2、导入方法

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   <td> <p>1</p> <p>2</p> </td> 
   <td> <p><code>[DllImport(</code><code>"user32.dll"</code><code>, EntryPoint = </code><code>"GetKeyboardState"</code><code>)]</code></p> <p><code>public</code> <code>static</code> <code>extern</code> <code>int</code> <code>GetKeyboardState(</code><code>byte</code><code>[] pbKeyState);</code></p> </td> 
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3、大小写状态

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   <td> <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <p>9</p> </td> 
   <td> <p><code>public</code> <code>static</code> <code>bool</code> <code>CapsLockStatus</code></p> <p><code>{ </code></p> <p><code>get</code></p> <p><code>{ </code></p> <p><code>byte</code><code>[] bs = </code><code>new</code> <code>byte</code><code>[256];</code></p> <p><code>GetKeyboardState(bs);</code></p> <p><code>return</code> <code>(bs[0x14] == 1);</code></p> <p><code>}</code></p> <p><code>}</code></p> </td> 
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4、引用，此部分根据你的需要来修改

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   <td> <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> </td> 
   <td> <p><code>private</code> <code>void</code> <code>button2_Click(</code><code>object</code> <code>sender, EventArgs e)</code></p> <p><code>{ </code></p> <p><code>if</code> <code>(CapsLockStatus == </code><code>true</code><code>)</code></p> <p><code>MessageBox.Show(</code><code>"键盘处于大写锁定状态！"</code><code>);</code></p> <p><code>else</code></p> <p><code>MessageBox.Show(</code><code>"键盘处于小写状态！"</code><code>);</code></p> <p><code>}</code></p> </td> 
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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