AH = 11h
	DS:DX -> unopened FCBsee File Control Block (see #01345), may contain '?' wildcards
Return: AL = status
	    00h successful
		[DTAsee Disk Transfer Address] unopened FCBsee File Control Block for first matching file
	    FFh no matching filename, or bad FCBsee File Control Block
Notes:	the type of the returned FCBsee File Control Block depends on whether the input FCBsee File Control Block was a
	  normal or an extended FCBsee File Control Block
	the data returned in the DTAsee Disk Transfer Address (disk transfer area) is actually the
	  drive number (or extended FCBsee File Control Block header and drive number) followed by
	  the file's directory entry (see #01352); this format happens to be
	  compatible with an unopened FCBsee File Control Block
	for extended FCBs with search attribute 08h, the volume label (if any)
	  will be returned even if the current directory is not the root dir.
	DOS 3.0+ also allows the '*' wildcard
	the search FCBsee File Control Block at DS:DX must not be modified if AH=12h will be used to
	  continue searching; DOS 3.3 has set the following parts of the FCBsee File Control Block:
		 0Ch	BYTE	???
		 0Dh	WORD	directory entry number of matching file
		 0Fh	WORD	cluster number of current directory
		 11h  4 BYTEs	???
		 15h	BYTE	drive number (1=A:)
	this function is used by many copy protection schemes to obtain the
	  starting cluster of a file
BUG:	under Windows95, if a .EXE program ("MZThe letters M and Z appear in numerous places in DOS (memory control blocks, .EXE header, etc.); the conventional explanation is that these are the initials of Mark Zbikowski, one of the principal architects of MSDOS 2.0." header) rather than a true
	  .COM calls this function from a DOS box, the ten bytes of the
	  directory entry from 0Ch to 15h may be filled with zeros rather than
	  the additional file times
SeeAlso: AH=12h,AH=1Ah,AH=4Eh,INT 2F/AX=111Bh

Format of DOS directory entry:
Offset	Size	Description	(Table 01352)
 00h  8 BYTEs	blank-padded filename
		first character is set to E5h for deleted files (05h for
		  pending delete files under Novell DOS / OpenDOS)
 08h  3 BYTEs	blank-padded file extension
 0Bh	BYTE	attributes
 0Ch 10 BYTEs	(MS-DOS 1.0-6.22) reserved
		(DR DOS) used to store file password / owner (see #01354)
			(see also INT 21/AX=4302h)
		(Novell DOS 7) DELWATCH data (see #01354)
		(MS-DOS 7/Windows95) additional file times (see #01353)
 16h	WORD	time of creation or last update (see #01665 at AX=5700h)
 18h	WORD	date of creation or last update (see #01666 at AX=5700h)
 1Ah	WORD	starting cluster number (see also AX=440Dh/CX=0871h)
		(may not be set in INT 21/AH=11h return data for FAT32 drives)
 1Ch	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	file size
SeeAlso: #01355,#02628,#02629

Format of MS-DOS 7/Windows95 additional file times:
Offset	Size	Description	(Table 01353)
 00h	BYTE	reserved
 01h	BYTE	10-millisecond units past creation time below
 02h	WORD	file creation time
 04h	WORD	file creation date
 06h	WORD	last-access date
 08h	WORD	(FAT32) high word of starting cluster number
Note:	this data is stored beginning at offset 0Ch in a standard directory
SeeAlso: #01352

Format of DR DOS 6/Novell DOS 7 additional file information:
Offset	Size	Description	(Table 01354)
 0Ch	BYTE	reserved (00h)
		(DOSPLUS v1.2) user-defined attributes for CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs).  MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. compatibility
		  (bit 7 = F1,...,bit 4 = F4, bits 3-0 reserved (0))
 0Dh	BYTE	first character of original filename for deleted file
 0Eh	WORD	encrypted file/directory password
 10h	WORD	reserved (00h)
		(Novell DOS 7 DELWATCH) original file time
		    cleared when file is undeleted or purged
 12h	WORD	(DR DOS 6) file owner ID
		(Novell DOS 7 DELWATCH) original file date
		    cleared when file is undeleted or purged
 14h	WORD	single/multiuser file/directory access rights (see AX=4302h)
---deleted files---
 16h	WORD	(Novell DOS 7 DELWATCH) time of deletion
 18h	WORD	(Novell DOS 7 DELWATCH) date of deletion
Note:	offsets are within the full directory entry
SeeAlso: #01352

Format of MS-DOS 7/Windows95 long-filename directory entry:
Offset	Size	Description	(Table 01355)
 00h	BYTE	LFN record sequence and flags
		bits 5-0: sequence number
		bit 6: set if last long-filename record for file
		bit 7: set if file deleted
 01h 10 BYTEs	long filename, first part
 0Bh	BYTE	0Fh (otherwise impossible file attribute, used as signature)
 0Ch	BYTE	reserved??? (00h)
 0Dh	BYTE	checksum for short filename
 0Eh 12 BYTEs	long filename, second part
 1Ah	WORD	first cluster number (always 0000h for LFN records)
 1Ch  4 BYTEs	long filename, third part
Notes:	long-filename entries are always stored in the directory just prior
	  to the short-name entry for a file
	multiple LFN records are used if the long filename does not fit into
	  a single record
	the short-filename checksum byte is computed by adding up the
	  eleven bytes of the short filename, rotating the intermediate
	  sum right one bit before adding the next character
	the long filename is encoded as 16-bit Unicode characters; for most
	  filenames, this appears in the directory as the ASCII character
	  followed by 00h
SeeAlso: #01352,INT 21/AX=5704h,INT 21/AH=71h