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[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
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:
VB.NET:
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!
ByVal is a VB keyword that specifies a variable to be passed as a parameter BY VALUE. In other words, if the function or sub changes the value of the internal variable, it does not change the value of the external variable that was passed to it.
4/25/2007 3:19:55 AM - josep1er@cmich.edu-141.209.229.179
ByRef is a VB keyword that specifies a variable to be passed as a parameter BY REFERENCE. In other words, the pointer to the variable is passed and any change to its value made within the function or sub will change its value outside the function/sub.
4/25/2007 3:19:29 AM - anonymous
ByVal is a VB keyword that specifies a variable to be passed as a parameter BY VALUE. In other words, if the function or sub changes the value of the internal variable, it does not change the value of the external variable that was passed to it.
4/25/2007 3:19:55 AM - josep1er@cmich.edu-141.209.229.179
TODO - a short description
3/16/2007 8:17:31 AM - -63.69.129.2
ByVal is a VB keyword that specifies a variable to be passed as a parameter BY VALUE. In other words, if the function or sub changes the value of the internal variable, it does not change the value of the external variable that was passed to it.
4/25/2007 3:19:55 AM - josep1er@cmich.edu-141.209.229.179
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