Command
QisLib_SetSDFFill

QisLib_SetSDFFill

Function:
	int QisLib_SetSDFFill(int Index);

Inputs:
	Index: Fill pattern as defined in colfill.pat.

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

Errors:
	1: 'DisplayHandle' parameter of QisLib_InitLib is NULL, operation not permitted.
	-1: QisLib has not been initialized

Description:
	- Sets the fill pattern for the cell references drawn as filtered boxes, beacuse their
	size in pixels, is smaller than the cell display filter size currently set.
	- On Unix/Linux, this function does nothing if the 'DisplayHandle' parameter was set
	to NULL in QisLib_InitLib.