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MFC MDI切换menu原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...向导生成的SDI或MDI应用程序时，它创建了菜单资源（使用IDR_MAINFRAME作为其资源id。此菜单显示在所有时间SDI应用程序，并且仅在...当应用程序向导生成的 SDI 或 MDI 应用程序时，它创建了菜单资源 （使用 IDR_MAINFRAME 作为其资源 id...
ON_COMMAND_EX、ON_COMMAND区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...定义的消息处理函数解释该参数是当前要处理的命令消息ID。
返回值：如果扩展映射宏的消息处理函数返回FALSE，则导致当前消息被发送给消息路径上的下一个消息目标处理。
综合来看，ON_COMMAND_EX宏有两个功能：
一是可以...
MFC MDI程序的窗口菜单无法正确显示 - C/C++ - 清泛网 - 专注C/C++及内核技术
...n looks for a pop-up menu containing standard Window menu commands such as ID_WINDOW_NEW and ID_WINDOW_TILE_HORZ.Override this member function if you have a Window menu that does not use the standard menu command IDs.
所以，只需要覆盖函数CMDIFrameWnd::GetWindowMenuPopup就可以解决问...
常用Sql - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...ists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` decimal(18,0) NOT NULL COMMENT '递增ID',
`FIELD_1` varchar(32) NOT NULL COMMENT '字段1',
`FIELD_2` varchar(32) NOT NULL COMMENT '字段2',
...
SQL中使用update inner join和delete inner join；Oracle delete join替代...
...tb_User usr
inner join tb_Address addr on usr.nAddressFK = addr.nAddressID
where usr.id=123
update的格式是
update t1 set t1.name=’Liu’ from t1 inner join t2 on t1.id = t2.tid
MySQL，ACCESS 写法如下：
Sql代码
UPDATE mem_world AS mw1 INNER JOIN mem_world AS ...
phpcms v9内容页/下载页更新时间（updatetime）为空的解决方法 - 更多技术 ...
... define('INDEX_HTML',true);
$catid = $_POST['info']['catid'] = intval($_POST['info']['catid']);
if(trim($_POST['info']['title'])=='') showmessage(L('title_is_empty'));
$category = $this->categorys[$catid];
...
plsql 存储过程 事务 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的数据量
例子：
create or replace procedure stu_proc
(
v_id in number,
v_name in varchar2,
v_age in number,
v_msg out varchar2
) as
begin
insert into student(id, sname, age) values (v_id, v_name, v_age);
commit;
v_msg:='添加成功';
exception
when others th...
常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
...name;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` decimal(18,0) NOT NULL COMMENT '递增ID',
`FIELD_1` &...
【可动态编辑表格】App Inventor 2 Dynamic Editable HTML Table - App应用...
... to display data you might receive from a database table, starting with an id (primary key), and then the other data columns, for example data returned by a SELECT query from an sqlite/mysql database or similar dataset from a google sheet. Therefore it will not let you edit the id (primary key row) ...
ClickTools 拓展：为布局、标签等没有点击事件的组件添加点击事件 - App In...
...econdary-high)]499×533 28.5 KB
Documentation -
component ~ component
id ~ int (number)
id ~ id you used for your registered component
Use this event to set blocks of component click.
error ~ It returns the error if something went wrong
Use this event to do something after error occured...