How do I create non visual components in .NET that can be dragged and dropped onto a Form ? For example the imagelist component is a non visual component, it appears in the toolbox and can be dragged
Is there a way to determine how many dimensions there are in a PHP array开发者_C百科?Nice problem, here is a solution I stole from the PHP Manual:
目录一、从数据库管理系统角度看1.模式2.外模式3.内模式4.模式之间的映射（1）外模式/模式之间的映射（2）模式/内模式之间的映射二、从构件角度看，数据库系统由硬件、软件等部分组成三、从最总用户的角...
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