INFO: Default Filename for Text File Error Log: VBEVENTS.LOG

MORE INFORMATION

You can log events in your Visual Basic program by using the LogEvent method. If your program is running under Windows NT, the specified events are logged in the NT Event Log. Under Windows 95 and Windows 98, the specified events are logged to a text file, vbevents.log.

You can change the location and the file name of the event log by setting the LogPath property to the path and location of your choice and setting the mode argument of the LogMode property to vbLogToFile.

You cannot set the LogPath Property directly. Instead, you must use the StartLogging Method to set the LogPath Property.

The LogEvents and StartLogging Methods work only in a compiled EXE. They do not work in the Microsoft Visual Basic IDE.

For more information, refer to the LogMode Property topic of the online Help.

Step-by-Step Example

1. Start a new Visual Basic project. Form1 is created by default.
2. Place the following code in the General Declarations section of Form1:

         Private Type OSVERSIONINFO
             dwOSVersionInfoSize As Long
             dwMajorVersion As Long
             dwMinorVersion As Long
             dwBuildNumber As Long
             dwPlatformId As Long
             szCSDVersion As String * 128
         End Type
   
         Private Declare Function GetVersionExA Lib "kernel32" _
             (lpVersionInformation As OSVERSIONINFO) As Integer
   
         Private Sub Form_Click()
         Dim osinfo As OSVERSIONINFO
         Dim retvalue As Integer
   
         osinfo.dwOSVersionInfoSize = 148
         osinfo.szCSDVersion = Space$(128)
         retvalue = GetVersionExA(osinfo)
   
         'Log an Event before setting LogPath:
         App.LogEvent "Event1", vbLogEventTypeError
         Print "LogPath before StartLogging: " & App.LogPath
         'Use StartLogging to set LogPath:
         App.StartLogging "c:\MyEventLog.txt", vbLogAuto
         Print "LogPath after StartLogging: " & App.LogPath
         'Log another Event, after setting LogPath:
         App.LogEvent "Event2", vbLogEventTypeError
   
             'If Windows 95 or 98:
             If osinfo.dwPlatformId = 1 Then
             Print "Logged 'Event1' in " & _
                 Environ("windir") & "\vbevents.log"
             Print "Logged 'Event2' in LogPath (" & App.LogPath & ")"
             'If Windows NT:
             ElseIf osinfo.dwPlatformId = 2 Then
             Print "Logged 'Event1' & 'Event2' in the NT Event Log."
             End If
         End Sub
   					

3. Choose Make Project1.exe from the File menu. The LogEvents and StartLogging Methods work only in a compiled EXE.
4. Run Project1.exe, and then click the form.