The handler returns the pageNumber th page of data containing pageSize rows.

处理程序返回第 pageNumber 页的数据，其中包含 pageSize 行。

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If the handler returns TRUE, the message will be handled by the parent as well, while a call that returns FALSE does not allow the parent to handle it.

如果该处理返回TRUE，消息就也会给父窗口来处理，而如果它返回的是一个FALSE值，就不会让父窗口来处理该消息。

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If the signal handler returns, the process continues executing the normal sequence of instructions it was executing when the signal was caught.

如果信号处理器返回，则进程继续执行信号被捕获时正在执行的正常的指令序列。

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