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- 'VBLZH.DLL by Philip Bush - Copyright 1995
- '
- ' Compression/Decompression, file functions, and disk space functions for Visual Basic
- '
- ' SHAREWARE FEE $15
- '
- ' Benefits: - Unlimited distribution rights for registered users.
- ' - Receive the latest registered version by floppy disk.
- ' - Removes shareware notice from compression/decompression status window.
- '
- ' Borland Delphi (pascal) VBLZH.DLL source code $99.
- '
- ' Philip Bush
- ' Macware
- ' 748 N. Hwy 67, Suite 163
- ' Florissant, MO 63031
- '
- ' check/money order/cash/Visa/Mastercard payments accepted
- '
- ' phone: (314) 838-7620 email: WWHH86A@PRODIGY.COM
-
- '**PROCEDURE/FUNCTION SUMMARY**
-
- ' LZH lzh compression & decompression of files, includes status Window
- ' DelFile% deletes file from a disk
- ' RenFile% renames a file
- ' GetFileSize& file size in bytes
- ' FileExist% does file exist
- ' CopyFile% copies a file
- ' RetrieveFileName$ retrieves the file name from fully or partially qualified path name
- ' RetrieveFilePath$ retrieves the file path from fully or partially qualified path name
- ' FileDate& date of the file named by FName as a LongInt (use CVDATE to evaluate)
- ' FileExtension$ returns a string containing the three-character extension
- ' FSearch$ searches through directories for a particular file name
- ' FAttribDescr$ returns a file attribute description (/ delimited text description)
- ' FAttribVal% returns file attribute value
- ' FileSetAttrib% set a file's attributes
- ' DiskFreeSpace& returns a disk's free space in bytes
- ' DiskSpace& returns disk size in bytes
-
- '**DECLARE**
-
- Declare Sub LZH Lib "VBLZH.DLL" (ByVal fromfile$, ByVal tofile$, ByVal action$, errc&, inf&, otf&)
- Declare Function DelFile% Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function RenFile% Lib "VBLZH.DLL" (ByVal OldF$, ByVal NewF$)
- Declare Function GetFileSize& Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FileExist% Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function CopyFile% Lib "VBLZH.DLL" (ByVal FromF$, ByVal ToF$)
- Declare Function RetrieveFileName$ Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function RetrieveFilePath$ Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FileDate& Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FileExtension$ Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FSearch$ Lib "VBLZH.DLL" (ByVal FName$, ByVal DirList$)
- Declare Function FAttribVal% Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FAttribDescr$ Lib "VBLZH.DLL" (ByVal FName$)
- Declare Function FileSetAttrib% Lib "VBLZH.DLL" (ByVal FName$, ByVal attr%)
- Declare Function DiskFreeSpace& Lib "VBLZH.DLL" (ByVal driveltr$)
- Declare Function DiskSpace& Lib "VBLZH.DLL" (ByVal driveltr$)
-
- '**INSTRUCTIONS**
-
- '*LZH file compression & decompression
- ' usage:
- ' fromfile$ = original file
- ' tofile$ = destination file (caution, will be overwritten!)
- ' action$ = "E" = compresss (encode) "D" = uncompress (decode)
- '
- ' returns:
- ' errc& (error codes):
- ' errc& = -1 no error encountered
- ' errc& = 1 Error reading input file
- ' errc& = 2 Error writing output file
- ' errc& = 3 Error opening input
- ' errc& = 4 Error opening output
- ' errc& = 5 Error: use [D] for Decompression or [E] for Compression
- ' errc& = 6 overflow read error - usually during decode on a non-compressed file
- ' errc& = 7 overflow write error - usually during decode on a non-compressed file
- ' errc& = 8 Error getting filesize
- '
- ' inf& = original file size in bytes
- ' otf& = destination file size in bytes
- '
- 'Declare Sub LZH Lib "VBLZH.DLL" (ByVal fromfile$, ByVal tofile$, ByVal action$, errc&, inf&, otf&)
-
- '*Delete File
- ' -1 = successful, 0 = failed (file cannot be deleted or does not exist)
- '
- 'Declare Function DelFile% Lib "VBLZH.DLL" (ByVal Fname$)
-
- '*RenFile function attempts to change the name of the file specified by Old to New
- ' -1 = successful, false = failed (will not rename if new already exists)
- '
- 'Declare Function RenFile% Lib "VBLZH.DLL" (ByVal OldF$,ByVal NewF$)
-
- '*GetFileSize function returns the file size in bytes
- 'HFILE_ERROR or -1 = failed, >= 0 file size in bytes
- '
- 'Declare Function GetFileSize& Lib "VBLZH.DLL" (ByVal Fname$)
-
- '*FileExist function tests if a file exists
- ' -1 = file exists, 0 = file doesn't exist
- '
- 'Declare Function FileExist% Lib "VBLZH.DLL" (ByVal Fname$)
-
- '*CopyFile function copies the FromFile to the ToFile
- ' -1 = successful, 0 = file copy failed
- '
- 'Declare Function CopyFile% Lib "VBLZH.DLL" (ByVal FromF$, ByVal ToF$)
-
- '*RetrieveFileName takes a fully or partially qualified path name in FName and returns
- ' a string containing only the file name part, including the name and extension.
- '
- 'Declare Function RetrieveFileName$ Lib "VBLZH.DLL" (ByVal FName$)
-
- '*RetrieveFilePath takes a fully or partially qualified path name in FName and returns
- ' a string containing only the path part (drive letter and directories).
- '
- 'Declare Function RetrieveFilePath$ Lib "VBLZH.DLL" (ByVal FName$)
-
- '*FileDate function returns the date of the file named by FName as a LongInt.
- ' Use the VB function CVDATE to evaluate. Ex: Dt$=CVDATE(FileDate&("C:\AUTOEXEC.BAT"))
- ' -999999 = error. usually indicates that the file doesn't exist.
- ' (note: check for this value - CVDATE will return an error using this value)
- '
- 'Declare Function FileDate& Lib "VBLZH.DLL" (ByVal FName$)
-
- '*FileExtension function takes a fully qualified FileName and returns a string
- ' containing the three-character extension.
- '
- 'Declare Function FileExtension$ Lib "VBLZH.DLL" (ByVal FName$)
-
- '*FSearch function searches through the directories passed in DirList for a file named
- ' Name. DirList should be in the same format as a DOS PATH: directory names
- ' separated by semicolons. If FileSearch locates a file matching Name, it returns a string
- ' containing a fully-qualified path name for that file. If no matching file exists,
- ' FileSearch returns an empty string.
- '
- 'Declare Function FSearch$ Lib "VBLZH.DLL" (ByVal FName$, Byval DirList$)
-
- '*FAttribVal returns the file attributes of the file given by FName. The attributes can
- ' be examined by AND-ing with the constants listed below. If the return value is negative,
- ' an error occurred and the value is a negative DOS error code.
- ' Normal 0
- ' Read-only files 1
- ' Hidden files 2
- ' System files 4
- ' Volume ID files 8
- ' Directory files 16
- ' Archive files 32
- ' Unusual 63
- '
- ' <0 = error
- '
- 'Declare Function FAttribVal% Lib "VBLZH.DLL" (ByVal FName$)
-
- '*FAttribDescr returns the file attributes of the file given by FName. The attributes are
- ' in a slash (\) delimited string.
- ' Returns may include: Normal,Read-only,Hidden,System,Volume, Directory, Archive, Unusual
- ' and Error
- '
- 'Declare Function FAttribDescr$ Lib "VBLZH.DLL" (ByVal FName$)
-
- '*FileSetAttrib sets the file attributes of the file given by FileName to the value given
- ' by Attr. The attribute value is formed by OR-ing the appropriate constants (listed below).
- ' The return value is zero if the function was successful. Otherwise the return value is a
- ' negative DOS error code.
- ' Normal 0
- ' Read-only files 1
- ' Hidden files 2
- ' System files 4
- ' Volume ID files 8
- ' Directory files 16
- ' Archive files 32
- ' Unusual 63
- '
- ' <0 = error
- '
- 'Declare Function FileSetAttrib% Lib "VBLZH.DLL" (ByVal FName$, ByVal attr%)
-
-
- 'Disk Free Space returns the free space in bytes of the specified drive
- ' -1 = drive letter is invalid, >=0 = disk free space in bytes
- '
- 'Declare Function DiskFreeSpace& Lib "VBLZH.DLL" (ByVal driveltr$)
-
- '*DiskSpace returns the size in bytes of the specified drive
- ' -1 = drive letter is invalid, >=0 = disk size in bytes
- '
- 'Declare Function DiskSpace& Lib "VBLZH.DLL" (ByVal driveltr$)
-
-