INT 92 - Da Vinci eMail Dispatcher - "NetCheckQueue"
        AX = E10Bh
        BX = size of parameter block in words (0004h)
        CX:DX -> parameter block (see below)
Return: AX = 0001h
SeeAlso: AX=E102h,AX=E10Ch

Format of parameter block:
Offset  Size    Description
 00h    WORD    segment of 24-byte username buffer
 02h    WORD    offset of 24-byte username buffer
 04h    WORD    segment of 24-byte protocol buffer
 06h    WORD    offset of 24-byte protocol buffer

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