Clear box command-line tool syntax

The clear box command-line tool can be used to call a clear box generator DLL from the command-line. Parameter values and optional ports for the relevant megafunction are also passed via the clear box command-line tool.

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Syntax	`clearbox <cbc_megafunction.dll>` [-h] [-f `param_file`] `parameter1=value1 parameter2=value2` ... `port1_name port2_name` ... [CBX_FILE=`file_name`]
Arguments	`<cbx_megafunction.dll>`	The clear box dll for the megafunction, for example, `cbx_altmult_add.dll`. Required.
	-h	Lists valid parameter names and values and port names for the clear box generator DLL. For example, `clearbox cbx_altmult_add.dll -h` generates a list of valid ports and parameters for the `cbx_altmult_add` megafunction. Optional.
	-f `param_file`	Uses a text file to pass parameter and port names to the clear box command-line tool. This is helpful when a large number of parameters and ports must be passed through the clear box command-line tool. The text file uses one parameter or port name per line and uses the `parameter=value` or `port_name` format. You can add comments or ignore lines in the text file by adding `#` to the beginning of a line. Optional.
	`parameter1=value1 parameter2=value2` ...	List of parameters and values to use with the clear box megafunction DLL. Optional.
	`port1_name port2_name` ...	List of ports to use with the clear box megafunction DLL. Optional.
	CBX_FILE=`file_name`	A parameter that is used by all clear box DLLs to specify an output file. Valid extensions are .v, .vhd, or .tdf. Optional.