KeyDragZoom
The
KeyDragZoom is part of the GMaps Utility Library.
Press "ctrl" (you can choose between "ctrl", "alt" and "shift"), click over the map and drag the mouse. It's an alternative to
DragZoomControl
Code.aspx
<cc1:GMap ID="GMap1" runat="server" />
Code.aspx.cs
KeyDragZoom keyDragZoom = new KeyDragZoom();
keyDragZoom.key = KeyDragZoom.HotKeyEnum.ctrl;
keyDragZoom.boxStyle = "{border: '4px solid #FFFF00'}";
keyDragZoom.paneStyle = "{backgroundColor: 'black', opacity: 0.2, cursor: 'crosshair'}";
GMap1.addKeyDragZoom(keyDragZoom);