Shows how to use the GetFeature control to select features from a WMS layer.
Click or drag a box to select features, use the Shift key to add features to the selection, use the Ctrl key to toggle a feature's selected status. Note that this control also has a hover option, which is enabled in this example. This gives you a visual feedback by loading the feature underneath the mouse pointer from the WFS, but causes a lot of GetFeature requests to be issued.