Fully implemented map control with property and event model.
通过属性和事件模型实现的完整的地图控件。
The draw control is more straightforward and just needs to be added to the map.
而绘图控件则更为直白，只需将其添加到地图即可。
Once you create a property page for a control, you must provide the PROP_PAGE entry in the property map for the control.
一旦为控制项建立了属性页，您就必须在控制项的属性对应中提供PROP _ PAGE项目。
Once you create a property page for a control, you must provide the PROP_PAGE entry in the property map for the control.
一旦为控制项建立了属性页，您就必须在控制项的属性对应中提供PROP _ PAGE项目。
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