INT 21 u - LAN Manager Enhanced DOS - DosWriteMailslot                          
	AX = 5F52h
	BX = class
	CX = length of buffer
	DX = priority
	ES:DI -> DosWriteMailslot parameter structure (see #01726)
	DS:SI -> mailslot name
Return: CF clear if successful
	CF set on error
	    AX = error code
SeeAlso: AX=5F4Fh,AX=5F50h,AX=5F51h


Format of LAN Manager DosWriteMailslot parameter structure:
Offset	Size	Description	(Table 01726)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	timeout
 04h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> buffer