by Chris King (1 Submission)
Category: Windows API Call/Explanation
Compatability: Visual Basic 3.0
Difficulty: Advanced
Date Added: Wed 3rd February 2021
Rating: 
(6 Votes)
I tried to make this as light as possible just add it to your app and call SearchDirs. It takes two arguments the path to search in and the file or directory to find. It puts alot of Data on the Call Stack however it's very very fast. 3 API's, 5 Constants, 3 User Types, no activex or OLE runtime objects.
Thanks and feel free to email if you have any questions
Code Returns
Boolean
API DeclarationsPrivate Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" _
(ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As Long
Private Declare Function FindClose Lib "kernel32" (ByVal hFindFile As Long) As Long
Private Declare Function FindNextFile Lib "kernel32" Alias "FindNextFileA" _
(ByVal hFindFile As Long, lpFindFileData As WIN32_FIND_DATA) As Long
Private Const MaxLFNPath = 260
Private Const INVALID_HANDLE_VALUE = -1
Private Const VBKEYDOT = 46
Private Const VBBACKSLASH = "\"
Private Const VBALLFILES = "*.*"
Private Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End Type
Private Type WIN32_FIND_DATA
dwFileAttributes As Long
ftCreationTime As FILETIME
ftLastAccessTime As FILETIME
ftLastWriteTime As FILETIME
nFileSizeHigh As Long
nFileSizeLow As Long
dwReserved0 As Long
dwReserved1 As Long
cFileName As String * MaxLFNPath
cShortFileName As String * 14
End Type
Private WFD As WIN32_FIND_DATA
VBcoders'Chris King 01/08/2000 [email protected]
Option Explicit
Public Function SearchDirs(Curpath$, strFName$)
Dim strProg$
Dim dirs%
Dim dirbuf$()
Dim hItem&
Dim i%
Dim rtn As Boolean
If Curpath$ = "" Then Exit Function
If strFName$ = "" Then Exit Function
If Right(strFName$, 1) = VBBACKSLASH Then
strFName = Left(strFName, InStr(1, strFName, VBBACKSLASH, vbTextCompare) - 1)
End If
If Right(Curpath$, 1) <> VBBACKSLASH Then
Curpath$ = Curpath$ & VBBACKSLASH
End If
hItem& = FindFirstFile(Curpath$ & VBALLFILES, WFD)
If hItem& <> INVALID_HANDLE_VALUE Then
Do
If (WFD.dwFileAttributes And vbDirectory) Then
If Asc(WFD.cFileName) <> VBKEYDOT Then
If (dirs% Mod 10) = 0 Then ReDim Preserve dirbuf$(dirs% + 10)
dirs% = dirs% + 1
dirbuf$(dirs%) = Left$(WFD.cFileName, InStr(WFD.cFileName, vbNullChar) - 1)
End If
End If
strProg$ = Left(WFD.cFileName, InStr(WFD.cFileName, vbNullChar) - 1)
If UCase(strProg$) = UCase(strFName$) Then
SearchDirs = True
Exit Function
Else
SearchDirs = False
End If
DoEvents
Loop While FindNextFile(hItem&, WFD)
Call FindClose(hItem&)
End If
For i% = 1 To dirs%
rtn = SearchDirs(Curpath$ & dirbuf$(i%) & VBBACKSLASH, strFName$)
SearchDirs = rtn
If rtn Then Exit Function
Next i%
End Function
