ACC: How to Tell If Windows for Workgroups Is Running

• Microsoft Access versions 1.0, 1.1, 2.0

SUMMARY

Although Microsoft Windows and Windows for Workgroups can both display the same version number, you can determine whether Windows for Workgroups is running by using a Windows API call in an Access Basic function.

MORE INFORMATION

The following example can be used to determine if Windows for Workgroups is running.

NOTE: In the following sample code, an underscore (_) is used as a line-continuation character. Remove the underscore from the end of the line when re-creating this code in Access Basic.

1. Create a new module and enter the following code:

         '***************************************************************
         '  Declarations section of the module
         '***************************************************************
            Option Explicit
            Const WNNC_NET_MultiNet = &H8000
            Const WNNC_SUBNET_WinWorkgroups = 4
            Const WNNC_NET_TYPE = 2
   
            Declare Function WNetGetCaps% Lib "User" (ByVal nIndex%)
   
         '================================================================
         'This function returns True if Windows for Workgroups is running,
         'or False if it is not (generic Windows). It accomplishes this by:
         ' - Calling WNetGetCaps and retrieving the net type flag.
         ' - Inspecting the low word of the flag to see if the Windows for
         '   Workgroups bit is set.
         '================================================================
            Function IsWFW% ()
               Dim wNetType As Integer
   
               wNetType = WNetGetCaps(WNNC_NET_TYPE)
               IsWFW = False
               If (wNetType And WNNC_NET_MultiNet) Then
                  IsWFW = ((wNetType And &HFFFF) And _
                        WNNC_SUBNET_WinWorkgroups) <> 0
               End If
            End Function
   
   

2. From the View menu, choose Immediate Window. Type the following in the Immediate window:

         MsgBox IIf(IsWFW(), "WFW", "Windows") & " is running!"