Command
QisLib_OpenStructure

Purpose

Function:
	int QisLib_OpenStructure(const char* CellName);

Inputs:
	CellName: Name of the cell to be loaded.

Return:
	success: 0
	failure: One of the following values :

Errors:
	-1: The specified cell name is invalid or empty.
	-2: The specified cell does not exist.
	-3: No GDSII or OASIS file has been opened.
	-4: File open in progress, operation not permitted.

Description:
	- Specifies the cell to be processed. Default is the deepest top cell.
	- The current window is set to the extents of the cell that has been opened.
	- If editing is on and some polygons are added outside the cell extents, the extents
	of 'CellName' and all the cells referenced by it are recalculated when this
	function is called. If the extents are not recalculated, data may not be drawn
	under certain conditions until this function is called.