无模式对话框对象能在程序运行期间都存在，并与应用程序共用同一个消息循环，从而使得对话框不会垄断用户的输入。
Modeless dialog can exist during the program process and use the same massage map, as same as the main program, so that the dialog does not monopolize the program input data.
其次，分析了适用于网格环境的高性能计算应用的程序结构，并通过有向无循环图(DAG)加以表示。
Secondly, the program structure of high performance computing applications in the grid environment is analyzed and represented by the directed acyclic graph (DAG).
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