Save a screenshot for the specified recttangle. The saved image will be created using a control UIElement
Parameters
- fileName
- screenshot file full name
- rect
- Rectangle (in control coordinate) to take screenshot for
Return Value
true if screenshot saved successfully
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2