If you want to access a workbook that's already open, then getting the assignment from the
Workbooks collection is straightforward:
dim myWB as Workbook Set myWB = Workbooks("UsuallyFullPathnameOfWorkbook.xlsx")
If you want to create a new workbook, then use the
Workbooks collection object to
Add a new entry.
Dim myNewWB as Workbook Set myNewWB = Workbooks.Add
There are times when you may not or (or care) if the workbook you need is open already or not, or possible does not exist. The example function shows how to always return a valid workbook object.
Option Explicit Function GetWorkbook(ByVal wbFilename As String) As Workbook '--- returns a workbook object for the given filename, including checks ' for when the workbook is already open, exists but not open, or ' does not yet exist (and must be created) ' *** wbFilename must be a fully specified pathname Dim folderFile As String Dim returnedWB As Workbook '--- check if the file exists in the directory location folderFile = File(wbFilename) If folderFile = "" Then '--- the workbook doesn't exist, so create it Dim pos1 As Integer Dim fileExt As String Dim fileFormatNum As Long '--- in order to save the workbook correctly, we need to infer which workbook ' type the user intended from the file extension pos1 = InStrRev(sFullName, ".", , vbTextCompare) fileExt = Right(sFullName, Len(sFullName) - pos1) Select Case fileExt Case "xlsx" fileFormatNum = 51 Case "xlsm" fileFormatNum = 52 Case "xls" fileFormatNum = 56 Case "xlsb" fileFormatNum = 50 Case Else Err.Raise vbObjectError + 1000, "GetWorkbook function", _ "The file type you've requested (file extension) is not recognized. " & _ "Please use a known extension: xlsx, xlsm, xls, or xlsb." End Select Set returnedWB = Workbooks.Add Application.DisplayAlerts = False returnedWB.SaveAs filename:=wbFilename, FileFormat:=fileFormatNum Application.DisplayAlerts = True Set GetWorkbook = returnedWB Else '--- the workbook exists in the directory, so check to see if ' it's already open or not On Error Resume Next Set returnedWB = Workbooks(sFile) If returnedWB Is Nothing Then Set returnedWB = Workbooks.Open(sFullName) End If End If End Function