'' Global Memory Flags
Private Const GMEM_MOVEABLE = &H2
Private Const GMEM_ZEROINIT = &H40
Private Const GENERIC_READ = &H80000000
Private Const FILE_SHARE_READ = &H1
Private Const OPEN_EXISTING = &H3
Private Const FILE_ATTRIBUTE_TEMPORARY = &H100
Private Const S_OK = &H0
Private Const GHND = (GMEM_MOVEABLE Or GMEM_ZEROINIT)
Private Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Long
End Type
Private Type OVERLAPPED
Internal As Long
InternalHigh As Long
offset As Long
OffsetHigh As Long
hEvent As Long
End Type
Private Declare Function GlobalAlloc()Function GlobalAlloc Lib "kernel32" (ByVal wFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function GlobalSize()Function GlobalSize Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function GlobalLock()Function GlobalLock Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function GlobalUnlock()Function GlobalUnlock Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function CreateFile()Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, lpSecurityAttributes As SECURITY_ATTRIBUTES, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function GetFileSize()Function GetFileSize Lib "kernel32" (ByVal hFile As Long, lpFileSizeHigh As Long) As Long
Private Declare Function ReadFile()Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As Long) As Long ''OVERLAPPED
Private Declare Function CloseHandle()Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function GlobalFree()Function GlobalFree Lib "kernel32" (ByVal hMem As Long) As Long
Sub LoadStreamFromFile()Sub LoadStreamFromFile(ByVal bstrFileName As String, ByRef pStream As IStream)
Dim hr As Long
Dim bReaded As Long
Dim hFile As Long
Dim dwFileSize As Long
Dim dwBytesRead As Long
Dim hGlobal As Long
Dim pvData As Long
Dim sa As SECURITY_ATTRIBUTES
With sa
.bInheritHandle = 0
.lpSecurityDescriptor = 0
.nLength = 0
End With
On Error Resume Next
hFile = CreateFile(bstrFileName, GENERIC_READ, FILE_SHARE_READ, sa, OPEN_EXISTING, FILE_ATTRIBUTE_TEMPORARY, 0)
If (hFile > 0) Then
dwFileSize = GetFileSize(hFile, 0)
If (dwFileSize > -1) Then
hGlobal = GlobalAlloc(GMEM_MOVEABLE, dwFileSize)
End If
End If
If (hGlobal > 0) Then
pvData = GlobalLock(hGlobal)
If (pvData > 0) Then
bReaded = ReadFile(hFile, ByVal pvData, dwFileSize, dwBytesRead, 0&)
If (bReaded <> 0) Then
Set pStream = CreateStreamOnHGlobal(hGlobal, True)
pStream.Seek 0, 0
End If
GlobalUnlock (hGlobal)
End If
If (hr <> S_OK) Then
GlobalFree (hGlobal)
Set pStream = Nothing
End If
End If
If (hFile > 0) Then
CloseHandle (hFile)
End If
End Sub
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