Problems calling Function with Argument (Need to pass File name from one function to another) Excel VBA - excel

Question

I am trying to integrate 2 functions.
I have one sub function which works to loop through all files one by one.
once it has identified the file name.
It should call the function to run, on the opened file.
I can not seem to find a way to pass this on,
I did some reading on calling functions with arguments but when i try this i get a "compile error seperate list or )"
Can you please point me in the right direction?
I have posted the code below:
Option Explicit
Option Base 1
Public Const DATASHEET As String = "MDFDATA"
Public Const TABLECONVERSIONSHEET As String = "TABLECONVERSION"
Public Const OPTIONSSHEET As String = "OPTIONS"
Public Const FinalSheet As String = "Final Sheet"
Public lByte_Order As Long 'byte order
Public lData_Groups As Long 'number of data groups
Public lChannel_Groups As Long 'number of channel groups
Public lChannels As Long 'number of channels
Public lTable_offset As Long 'row offset for the conversion table sheet
Sub OpenFiles()
Dim MyFolder As String
Dim MyFile As String
Dim sFile_Name As String 'MDF file name
Dim lFile_Number As Long 'file number
MyFolder = "C:\Users\Documents\Test"
sFile_Name = Dir(MyFolder & "\*.dat")
Do While sFile_Name <> ""
lFile_Number = FreeFile
Open sFile_Name For Binary Access Read Shared As lFile_Number
Call PARSE_MDF
Loop
End Sub
'==================================================================================================
' PARSE_MDF
' Main function
' Returns True if successful
'==================================================================================================
Function PARSE_MDF() As Boolean
Dim sFile_Name As String 'MDF file name
Dim lFile_Number As Long 'file number
Dim lData_Groups_Counter As Long 'data groups counter
Dim lChannel_Groups_Counter As Long 'channel groups counter
Dim lChannels_Counter As Long 'channels counter
Dim lRecords As Long 'number of records in data block
Dim lRecord_Length As Long 'length of record in data block
Dim lData_Group_Address As Long 'data group address
Dim lData_Address As Long 'data address
Dim lChannel_Group_Address As Long 'Channel group address
Dim lChannel_Address As Long 'Channel address
Dim byCol As Byte 'column counter for output
Dim wsData_Sheet As Worksheet 'main worksheet
Dim wsTable_Conversion_Sheet As Worksheet
Dim rFirst_Signal As Range 'first signal in channel group
Dim rLast_Signal As Range 'last signal in channel group
Dim rSignals As Range 'range of signal names for a channel group
Application.EnableEvents = False
lTable_offset = 0
Set wsTable_Conversion_Sheet = Workbooks(ActiveWorkbook.Name).Worksheets(TABLECONVERSIONSHEET)
Set wsData_Sheet = Workbooks(ActiveWorkbook.Name).Worksheets(DATASHEET)
'file selected
If sFile_Name <> "False" Then
'clear old data
wsData_Sheet.Columns.Clear
wsTable_Conversion_Sheet.Columns.ClearContents
'set headers
wsData_Sheet.Cells(1, 1).Value = "Signal name"
wsData_Sheet.Cells(2, 1).Value = "Data type"
wsData_Sheet.Cells(3, 1).Value = "Lsb"
wsData_Sheet.Cells(4, 1).Value = "Offset"
wsData_Sheet.Cells(5, 1).Value = "Bit length"
wsData_Sheet.Cells(6, 1).Value = "Formula ID"
wsData_Sheet.Cells(7, 1).Value = "Formula"
wsData_Sheet.Cells(8, 1).Value = "First Bit position"
wsData_Sheet.Cells(9, 1).Value = "Table length"
wsData_Sheet.Cells(10, 1).Value = "Start Row"
'offset columns because of headers
byCol = 2
'get file number
lFile_Number = FreeFile
'open file
'check file integrity
If IDBLOCK(lFile_Number) Then
'check data exists
If HDBLOCK(lFile_Number, lData_Group_Address) Then
'main iteration for data groups
For lData_Groups_Counter = 1 To lData_Groups
'check channel group exists
If DGBLOCK(lFile_Number, lData_Group_Address, lChannel_Group_Address, lData_Address) Then
'channel group iteration
For lChannel_Groups_Counter = 1 To lChannel_Groups
'get channel group data
Call CGBLOCK(lFile_Number, lChannel_Group_Address, lChannel_Address, lRecord_Length, lRecords)
'set the first signal range in this channel group
Set rFirst_Signal = wsData_Sheet.Cells(1, byCol)
'channels iteration
For lChannels_Counter = 1 To lChannels
'get channel data for each channel
Call CNBLOCK(lFile_Number, lChannel_Address, wsData_Sheet, byCol)
'excel fudge
If byCol <> 255 Then
byCol = byCol + 1
End If
Next 'lChannels_Counter
'set the last signal range in this channel group
Set rLast_Signal = wsData_Sheet.Cells(1, byCol - 1)
'format divider columns
wsData_Sheet.Columns(byCol).ColumnWidth = 5
wsData_Sheet.Columns(byCol).Interior.ColorIndex = 0
wsData_Sheet.Columns(byCol).Interior.Pattern = xlLightUp
wsData_Sheet.Columns(byCol).Interior.PatternColorIndex = xlAutomatic
'excel fudge
If byCol <> 255 Then
'for space between channels
byCol = byCol + 1
End If
Next 'lChannel_Groups_Counter
'get range of signals to get data for
Set rSignals = wsData_Sheet.Range(rFirst_Signal, rLast_Signal)
'get signal data
'no channel data in this data group
Else
PARSE_MDF = False
End If
Next 'lData_Groups_Counter
'no data in MDF file
Else
PARSE_MDF = False
End If
'not a MDF file
Else
PARSE_MDF = False
End If
'close file
Close #lFile_Number
'tidy up sheet
wsData_Sheet.Rows.EntireRow.AutoFit
wsData_Sheet.Columns.EntireColumn.AutoFit
wsData_Sheet.Rows("2:15").EntireRow.Delete
wsData_Sheet.Columns("A:A").EntireColumn.Delete
wsData_Sheet.Cells.HorizontalAlignment = xlCenter
'function ends normally
PARSE_MDF = True
'no file was selected
Else
PARSE_MDF = False
End If
Application.EnableEvents = True
End Function

Answer 1

What you need to do is to pass the found filename as argument to the function. Now your function does not have an argument to pass it on so first of all create one such for ex.
Function PARSE_MDF(ByVal myFilePath as String) As Boolean
Then you need to change your loop to call the function correctly for ex.
Do While sFile_Name <> ""
....
myboolenvaluetohodthereturnvalue = PARSE_MDF(sFile_Name)
.... 'does your funtion need to return value and be tested?
sFile_Name = Dir() 'Call dir again without parameter to skip to next found file
Loop
Otherwise I haven't checked your code but this should get you started..