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cellspacing="1" cellpadding="1" bgcolor="#000000"><tr bgcolor="#FFFFFF"><td width="100%" colspan="4" align="left"><table width="95%" align="center"><tr><td class="font1"><p align="center"><br><font size="3">全局热键</font><br><span class="nava"><font color="#CC9933">2000-09-15· 吴中卫·yesky</font></span></p><p style="margin-top: 0; margin-bottom: 0"> 通常在自己的程序里定义热键，只能在自己的应用窗口范围内使用，未免使用起来受到一定的限制。</p><p style="margin-top: 0; margin-bottom: 0">如果能在自己的应用程序里定义能被所有窗口访问的热键，应该是比较具有现实意义的。要定义一个全局热键，通常有三个步骤：</p><p style="margin-top: 0; margin-bottom: 0"> 1。定义 Windows 的消息 WM_HOTKEY 的 HOOK 链，即 procedure myshortcut(var message: TMessage); </p><p style="margin-top: 0; margin-bottom: 0"> message WM_HOTKEY;</p><p style="margin-top: 0; margin-bottom: 0"> 2。向 Windows 加入一个全局原子 hotkey : GlobalAddAtom(’hotkey’), 并保留其句柄</p><p style="margin-top: 0; margin-bottom: 0"> 3。向 Windows 登记热键链： RegisterHotKey( 应用句柄,全局原子句柄, mod_control ,88 ); </p><p style="margin-top: 0; margin-bottom: 0"> 其中，RegisterHotKey 函数原形如下</p><p style="margin-top: 0; margin-bottom: 0"> </p><p style="margin-top: 0; margin-bottom: 0"> BOOL RegisterHotKey(<br> HWND hWnd, // 连接热键的窗口句柄</p><p style="margin-top: 0; margin-bottom: 0"> int id, // 全局原子句柄</p><p style="margin-top: 0; margin-bottom: 0"> UINT fsModifiers, // 热键修饰标志</p><p style="margin-top: 0; margin-bottom: 0"> UINT vk // 虚拟键盘码</p><p style="margin-top: 0; margin-bottom: 0"> );</p><p style="margin-top: 0; margin-bottom: 0"> </p><p style="margin-top: 0; margin-bottom: 0"> 这里，fsModifiers 是指虚拟键盘码 vk 结合何种键一起生成 WM_HOTKEY 的消息，它是下列三值的组合：</p><p style="margin-top: 0; margin-bottom: 0"> </p><p style="margin-top: 0; margin-bottom: 0"> MOD_ALT // ALT 键必须按下</p><p style="margin-top: 0; margin-bottom: 0"> MOD_CONTROL // CTRL 键必须按下</p><p style="margin-top: 0; margin-bottom: 0"> MOD_SHIFT // SHIFT 键必须按下</p><p style="margin-top: 0; margin-bottom: 0"> </p><p style="margin-top: 0; margin-bottom: 0"> 有了这些准备，你就可以定义自己喜欢的方式了。下面是一个范例，当 CTRL + Q 在任何时候被按下时，都会打出 “你好，Crtl + Q 被按下” 的信息。</p><p style="margin-top: 0; margin-bottom: 0"> </p><p style="margin-top: 0; margin-bottom: 0">type<br> TForm1 = class(TForm)<br> procedure FormCreate(Sender: TObject);<br> procedure FormDestroy(Sender: TObject);<br><br> protected<br> procedure myshortcut(var message: TMessage); message WM_HOTKEY;<br> private<br> { Private-Deklarationen }<br> public<br> { Public-Deklarationen }<br> end;<br><br>⌨️ 快捷键说明
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