Specifies whether the background within the update region is to be erased.

指定更新区域的背景是否被擦除。

youdao

The system sends a WM_PAINT message to a window whenever its update region is not empty and there are no other messages in the application queue for that window.

该系统发送一个WM_PAINT消息到一个窗口时，它的更新区域不为空，并在该窗口的消息队列中没有其他消息。

youdao

The paint structure contains a rect data structure that has the smallest rectangle that completely encloses the update region and a flag that specifies whether the background has been erased.

绘图结构中包含了一个RECT数据结构，它包含了完全封闭更新区域的最小矩形以及一个标志，指明背景是否需要擦除。

youdao

The President had a meeting -- right before I came down here, was meeting with Secretary of State Clinton to get an update from the region.

WHITEHOUSE: Press Briefing

Later in the afternoon, he met with the Ambassador to Iraq, the commander in Iraq, and the "theater commander" in the region for an update on the situation in Iraq.

CNN: Vowing transparency, Obama OKs ethics guidelines

One European diplomat says he hopes that the Biden visit means that Clinton-era officials will update their ideas of the region, which often remain stuck in the war years and tend as a result to be anti-Serb.

ECONOMIST: America, Europe and the western Balkans