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70 lines
2.5 KiB
Plaintext
70 lines
2.5 KiB
Plaintext
See below some functions declarations for Visual Basic.
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Frequently Asked Question:
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Q: Each time I use the compress function I get the -5 error (not enough
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room in the output buffer).
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A: Make sure that the length of the compressed buffer is passed by
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reference ("as any"), not by value ("as long"). Also check that
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before the call of compress this length is equal to the total size of
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the compressed buffer and not zero.
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From: "Jon Caruana" <jon-net@usa.net>
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Subject: Re: How to port zlib declares to vb?
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Date: Mon, 28 Oct 1996 18:33:03 -0600
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Got the answer! (I haven't had time to check this but it's what I got, and
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looks correct):
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He has the following routines working:
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compress
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uncompress
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gzopen
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gzwrite
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gzread
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gzclose
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Declares follow: (Quoted from Carlos Rios <c_rios@sonda.cl>, in Vb4 form)
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#If Win16 Then 'Use Win16 calls.
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Declare Function compress Lib "ZLIB.DLL" (ByVal compr As
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String, comprLen As Any, ByVal buf As String, ByVal buflen
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As Long) As Integer
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Declare Function uncompress Lib "ZLIB.DLL" (ByVal uncompr
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As String, uncomprLen As Any, ByVal compr As String, ByVal
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lcompr As Long) As Integer
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Declare Function gzopen Lib "ZLIB.DLL" (ByVal filePath As
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String, ByVal mode As String) As Long
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Declare Function gzread Lib "ZLIB.DLL" (ByVal file As
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Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
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As Integer
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Declare Function gzwrite Lib "ZLIB.DLL" (ByVal file As
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Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
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As Integer
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Declare Function gzclose Lib "ZLIB.DLL" (ByVal file As
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Long) As Integer
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#Else
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Declare Function compress Lib "ZLIB32.DLL"
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(ByVal compr As String, comprLen As Any, ByVal buf As
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String, ByVal buflen As Long) As Integer
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Declare Function uncompress Lib "ZLIB32.DLL"
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(ByVal uncompr As String, uncomprLen As Any, ByVal compr As
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String, ByVal lcompr As Long) As Long
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Declare Function gzopen Lib "ZLIB32.DLL"
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(ByVal file As String, ByVal mode As String) As Long
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Declare Function gzread Lib "ZLIB32.DLL"
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(ByVal file As Long, ByVal uncompr As String, ByVal
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uncomprLen As Long) As Long
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Declare Function gzwrite Lib "ZLIB32.DLL"
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(ByVal file As Long, ByVal uncompr As String, ByVal
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uncomprLen As Long) As Long
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Declare Function gzclose Lib "ZLIB32.DLL"
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(ByVal file As Long) As Long
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#End If
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-Jon Caruana
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jon-net@usa.net
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Microsoft Sitebuilder Network Level 1 Member - HTML Writer's Guild Member
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