Category: <b>electronic mail</b>
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<pre><b>INT 16 - Shamrock Software EMAIL - SPECIFY COMMAND-WORD FOR USER FUNCTION</b>

	AX = 4503h
	DL = port number (01h = COM1)
	DH = maximum execution time in clock ticks (00h = 5 seconds)
	ES:BX -&gt; ASCIZ string with new user command-word
Return: AX = 4D00h if EMAIL installed on specified port
Notes:	a single user command (consisting of only uppercase letters and digits)
	  may be defined, and remains valid until it is overwritten or the
	  EMAIL program terminates; the user command must be activated by
	  calling AX=4504h at least once.
	an existing command word may be redefined with this function
SeeAlso: AX=4504h,AX=4505h
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