C# Signature:
[DllImport("kernel32.dll", BestFitMapping = false, ThrowOnUnmappableChar = true))]
static extern int OpenFile([System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPStr)]string lpFileName, out OFSTRUCT lpReOpenBuff,
[Enum.OpenFile] uStyle);
User-Defined Types:
[System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
public struct OFSTRUCT
{
public byte cBytes;
public byte fFixedDisc;
public UInt16 nErrCode;
public UInt16 Reserved1;
public UInt16 Reserved2;
[System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 128)]
public string szPathName;
}
VB.NET Signature:
Private Declare Function OpenFile Lib "kernel32.dll" (ByVal lpFileName As String, ByRef lpReOpenBuff As OFSTRUCT, ByVal uStyle As Long) As Long
User-Defined Types:
<System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)> _
Public Structure OFSTRUCT
Public cBytes As Byte
Public fFixedDisc As Byte
Public nErrCode As UInt16
Public Reserved1 As UInt16
Public Reserved2 As UInt16
<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst:=128)> _
Public szPathName As String
End Structure
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
Private Const OF_EXIST As Long = &H4000
Private Const OF_ERROR As Long = -1
Private Const OFS_MAXPATHNAME As Long = 128
Public Function FileExists(ByVal sFile As String) As Boolean
Dim lRetVal As Long
Dim of As OFSTRUCT
lRetVal = OpenFile(sFile, of, OF_EXIST)
If lRetVal <> OF_ERROR Then
FileExists = True
Else
FileExists = False
End If
End Function
Alternative Managed API:
Do you know one? Please contribute it!
