Useful WinAPI calls

Private Declare Function ShellExecute Lib "shell32.dll" Alias _
   "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation _
   As String, ByVal lpFile As String, ByVal lpParameters _
   As String, ByVal lpDirectory As String, ByVal nShowCmd _
   As Long) As Long

Public Declare Function GetTickCount Lib "kernel32" () As Long

Private Declare Function GetUserName Lib "advapi32.dll" Alias _
"GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long

Private Declare Function GetComputerName _
Lib "kernel32" Alias "GetComputerNameA" _
(ByVal lpBuffer As String, nSize As Long) As Long

Function getWindowsUserId() As String
' Returns the network login name.
Dim lngLen As Long, lngX As Long
Dim strUserName As String
strUserName = String$(254, 0)
lngLen = 255
lngX = GetUserName(strUserName, lngLen)
If lngX <> 0 Then
    getWindowsUserId = Left$(strUserName, lngLen - 1)
Else
    getWindowsUserId = "Unknown"
End If

End Function


Public Function GetWorkstationId() As String
' Retrieve the name of the computer.
Const acbcMaxComputerName = 15
Dim strBuffer As String
Dim lngLen As Long
strBuffer = Space(acbcMaxComputerName + 1)
lngLen = Len(strBuffer)
If CBool(GetComputerName(strBuffer, lngLen)) Then
    GetWorkstationId = Left$(strBuffer, lngLen)
Else
    GetWorkstationId = ""
End If
End Function

Public Function OpenPDFFile(ByVal strFileName) As Boolean
Dim lngErr As Long
'Dim objShell As Object

'objShell.ShellExecute
Const SW_SHOWNORMAL = 1
lngErr = ShellExecute(0, "OPEN", strFileName, vbNullString, vbNullString, SW_SHOWNORMAL)

OpenPDFFile = lngErr > 32
End Function