调查放分,你用过virtual关键字吗? up不给分,可以回答y or n. 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 Yes 多次使用了/ by LY http://lysoft.7u7.net http://liuyang.7i24.com http://lysoft.91i.net 数据库编程中也常用。否则SQL太重复了 用过,ole,调有excel,在loap里也用 你就问我一声写过多少回 Interface and CoClass 就可以了。----------------过河卒 YES我用过.而且比较多呢. 不会用但肯定有用面相对象怎没有VIRTUAL 当然用了(不过好像Interface中不用吧) virtual; abstract;这样也比较经常的用 yes,在面对对象开发中,使用好多态特性的基础就是使用好virtual!^_^ VK_LBUTTON Left mouse buttonVK_RBUTTON Right mouse buttonVK_CANCEL Control+BreakVK_MBUTTON Middle mouse buttonVK_BACK Backspace keyVK_TAB Tab keyVK_CLEAR Clear keyVK_RETURN Enter keyVK_SHIFT Shift keyVK_CONTROL Ctrl keyVK_MENU Alt keyVK_PAUSE Pause keyVK_CAPITAL Caps Lock keyVK_KANA Used with IMEVK_HANGUL Used with IMEVK_JUNJA Used with IMEVK_FINAL Used with IMEVK_HANJA Used with IMEVK_KANJI Used with IMEVK_CONVERT Used with IMEVK_NONCONVERT Used with IMEVK_ACCEPT Used with IMEVK_MODECHANGE Used with IMEVK_ESCAPE Esc keyVK_SPACE Space barVK_PRIOR Page Up keyVK_NEXT Page Down keyVK_END End keyVK_HOME Home keyVK_LEFT Left Arrow keyVK_UP Up Arrow keyVK_RIGHT Right Arrow keyVK_DOWN Down Arrow keyVK_SELECT Select keyVK_PRINT Print key (keyboard-specific)VK_EXECUTE Execute keyVK_SNAPSHOT Print Screen keyVK_INSERT Insert keyVK_DELETE Delete keyVK_HELP Help keyVK_LWIN Left Windows key (Microsoft keyboard)VK_RWIN Right Windows key (Microsoft keyboard)VK_APPS Applications key (Microsoft keyboard)VK_NUMPAD0 0 key (numeric keypad)VK_NUMPAD1 1 key (numeric keypad)VK_NUMPAD2 2 key (numeric keypad)VK_NUMPAD3 3 key (numeric keypad)VK_NUMPAD4 4 key (numeric keypad)VK_NUMPAD5 5 key (numeric keypad)VK_NUMPAD6 6 key (numeric keypad)VK_NUMPAD7 7 key (numeric keypad)VK_NUMPAD8 8 key (numeric keypad)VK_NUMPAD9 9 key (numeric keypad)VK_MULTIPLY Multiply key (numeric keypad)VK_ADD Add key (numeric keypad)VK_SEPARATOR Separator key (numeric keypad)VK_SUBTRACT Subtract key (numeric keypad)VK_DECIMAL Decimal key (numeric keypad)VK_DIVIDE Divide key (numeric keypad)VK_F1 F1 keyVK_F2 F2 keyVK_F3 F3 keyVK_F4 F4 keyVK_F5 F5 keyVK_F6 F6 keyVK_F7 F7 keyVK_F8 F8 keyVK_F9 F9 keyVK_F10 F10 keyVK_F11 F11 keyVK_F12 F12 keyVK_F13 F13 keyVK_F14 F14 keyVK_F15 F15 keyVK_F16 F16 keyVK_F17 F17 keyVK_F18 F18 keyVK_F19 F19 keyVK_F20 F20 keyVK_F21 F21 keyVK_F22 F22 keyVK_F23 F23 keyVK_F24 F24 keyVK_NUMLOCK Num Lock keyVK_SCROLL Scroll Lock keyVK_LSHIFT Left Shift key (only used with GetAsyncKeyState and GetKeyState)VK_RSHIFT Right Shift key (only used with GetAsyncKeyState and GetKeyState)VK_LCONTROL Left Ctrl key (only used with GetAsyncKeyState and GetKeyState)VK_RCONTROL Right Ctrl key (only used with GetAsyncKeyState and GetKeyState)VK_LMENU Left Alt key (only used with GetAsyncKeyState and GetKeyState)VK_RMENU Right Alt key (only used with GetAsyncKeyState and GetKeyState)VK_PROCESSKEY Process keyVK_ATTN Attn keyVK_CRSEL CrSel keyVK_EXSEL ExSel keyVK_EREOF Erase EOF keyVK_PLAY Play keyVK_ZOOM Zoom keyVK_NONAME Reserved for future useVK_PA1 PA1 keyVK_OEM_CLEAR Clear key这么好用,干吗不用! 靠的.YYYYYYYYYYYYYYYYYYYYYYYYYYY就是父类虚函数,在创建分配个地址空间,加快运行速度 .孩子继承,重载,或者覆盖. 目前还没有, 我只知道在vc里,virtual 可是祖师爷. 不知道。我知道Nicrosoft写的那本书里说得很好。另外:我一定会用这个东西。。并且一定会用override……为什么不用? 关于ListControl控件的问题 DELPHI中三维立体显示的控件在哪? TIDtcpserver,TIDtcpclient在不同的网段能否通信,解决了马上给分 高手帮忙 多线程中,如何在主线程和其他线程中公用StringList,这个stringList如何传入到其他子线程中?多谢!! 如何获取未使用键盘、鼠标的时间? 如何读取dfm窗体文件,直接读! 过年喽,散分喽! 找师傅 手手手!!!!深出你的手!!!!!- 这样的抽奖算法怎么写? 关于winsock下getsockopt的问题
Interface and CoClass
就可以了。
----------------
过河卒
我用过.而且比较多呢.
但肯定有用面相对象怎没有VIRTUAL
在面对对象开发中,使用好多态特性的基础就是使用好virtual!
^_^
VK_RBUTTON Right mouse button
VK_CANCEL Control+Break
VK_MBUTTON Middle mouse button
VK_BACK Backspace key
VK_TAB Tab key
VK_CLEAR Clear key
VK_RETURN Enter key
VK_SHIFT Shift key
VK_CONTROL Ctrl key
VK_MENU Alt key
VK_PAUSE Pause key
VK_CAPITAL Caps Lock key
VK_KANA Used with IME
VK_HANGUL Used with IME
VK_JUNJA Used with IME
VK_FINAL Used with IME
VK_HANJA Used with IME
VK_KANJI Used with IME
VK_CONVERT Used with IMEVK_NONCONVERT Used with IME
VK_ACCEPT Used with IME
VK_MODECHANGE Used with IME
VK_ESCAPE Esc key
VK_SPACE Space bar
VK_PRIOR Page Up key
VK_NEXT Page Down key
VK_END End key
VK_HOME Home key
VK_LEFT Left Arrow key
VK_UP Up Arrow key
VK_RIGHT Right Arrow key
VK_DOWN Down Arrow key
VK_SELECT Select key
VK_PRINT Print key (keyboard-specific)
VK_EXECUTE Execute key
VK_SNAPSHOT Print Screen key
VK_INSERT Insert key
VK_DELETE Delete key
VK_HELP Help keyVK_LWIN Left Windows key (Microsoft keyboard)
VK_RWIN Right Windows key (Microsoft keyboard)
VK_APPS Applications key (Microsoft keyboard)
VK_NUMPAD0 0 key (numeric keypad)
VK_NUMPAD1 1 key (numeric keypad)
VK_NUMPAD2 2 key (numeric keypad)
VK_NUMPAD3 3 key (numeric keypad)
VK_NUMPAD4 4 key (numeric keypad)
VK_NUMPAD5 5 key (numeric keypad)
VK_NUMPAD6 6 key (numeric keypad)
VK_NUMPAD7 7 key (numeric keypad)
VK_NUMPAD8 8 key (numeric keypad)
VK_NUMPAD9 9 key (numeric keypad)VK_MULTIPLY Multiply key (numeric keypad)
VK_ADD Add key (numeric keypad)
VK_SEPARATOR Separator key (numeric keypad)
VK_SUBTRACT Subtract key (numeric keypad)
VK_DECIMAL Decimal key (numeric keypad)
VK_DIVIDE Divide key (numeric keypad)
VK_F1 F1 key
VK_F2 F2 key
VK_F3 F3 key
VK_F4 F4 key
VK_F5 F5 key
VK_F6 F6 key
VK_F7 F7 key
VK_F8 F8 key
VK_F9 F9 key
VK_F10 F10 key
VK_F11 F11 key
VK_F12 F12 key
VK_F13 F13 key
VK_F14 F14 key
VK_F15 F15 keyVK_F16 F16 key
VK_F17 F17 key
VK_F18 F18 key
VK_F19 F19 key
VK_F20 F20 key
VK_F21 F21 key
VK_F22 F22 key
VK_F23 F23 key
VK_F24 F24 key
VK_NUMLOCK Num Lock key
VK_SCROLL Scroll Lock key
VK_LSHIFT Left Shift key (only used with GetAsyncKeyState and GetKeyState)
VK_RSHIFT Right Shift key (only used with GetAsyncKeyState and GetKeyState)
VK_LCONTROL Left Ctrl key (only used with GetAsyncKeyState and GetKeyState)
VK_RCONTROL Right Ctrl key (only used with GetAsyncKeyState and GetKeyState)VK_LMENU Left Alt key (only used with GetAsyncKeyState and GetKeyState)
VK_RMENU Right Alt key (only used with GetAsyncKeyState and GetKeyState)
VK_PROCESSKEY Process key
VK_ATTN Attn key
VK_CRSEL CrSel key
VK_EXSEL ExSel key
VK_EREOF Erase EOF key
VK_PLAY Play key
VK_ZOOM Zoom key
VK_NONAME Reserved for future use
VK_PA1 PA1 key
VK_OEM_CLEAR Clear key这么好用,干吗不用!
孩子继承,重载,或者覆盖.