How to make Looping and Calculate formula from another workbook without open file - vba

Question

I want to ask how to do this from vba code
Workbook 1 contain cell A, cell B, cell C
Workbook 2 contain Cell D
each cell contains number value
Cell D = (Cell A - Cell B) * Cell C
i want to calculate and just return value to cell D in workbook 2, Here my code snippet
Dim path As String
Dim workbookName As String
Dim worksheetName As String
Dim cella As String, cellb As String, cellc As String
Dim returnedValue1 As String, returnedValue2 As String, returnedValue3 As String
Dim Hasil1 As Long
path = "D:\"
workbookName = "Workbook1"
worksheetName = "Daily"
cella = "F7"
cellb = "E7"
cellc = "D7"
returnedValue1 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cella).Address(True, True, -4150)
returnedValue2 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cellb).Address(True, True, -4150)
returnedValue3 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cellc).Address(True, True, -4150)
Worksheets("Workbook2").Cells(D).Value = CLng(ExecuteExcel4Macro(returnedValue1) - ExecuteExcel4Macro(returnedValue2)) * ExecuteExcel4Macro(returnedValue3)
as far my code was good, but how to do it in one column, i have many cell beside just cell A. I want to calculate like this
Column D = (Column A - Column B ) * COlumn C
thanks for your answer..

Answer 1

Something like that (while row in column A is not empty, it populates your expression in column D):
Sub mmacro()
Dim path As String
Dim workbookName As String
Dim worksheetName As String
Dim cella As String, cellb As String, cellc As String, celld As String
Dim returnedValue1 As String, returnedValue2 As String, returnedValue3 As String
Dim Hasil1 As Long
Dim rownum As Integer
Dim A As Integer, B As Integer, C As Integer, D As Integer
path = "D:\tmp\"
workbookName = "Book2"
worksheetName = "Sheet1"
cella = "F"
cellb = "E"
cellc = "D"
celld = "A"
rownum = 3'Data starts in row 3 in my example
Do
returnedValue1 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cella & rownum).Address(True, True, -4150)
returnedValue2 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cellb & rownum).Address(True, True, -4150)
returnedValue3 = "'" & path & "[" & workbookName & "]" & _
worksheetName & "'!" & Range(cellc & rownum).Address(True, True, -4150)
A = CInt(ExecuteExcel4Macro(returnedValue1))
B = CInt(ExecuteExcel4Macro(returnedValue2))
C = CInt(ExecuteExcel4Macro(returnedValue3))
D = (A - B) * C
Worksheets("Sheet1").Range(celld & rownum).Value = D
rownum = rownum + 1
Loop While Not D = 0
End Sub
This is just example. It is needed to be refined

Answer 2

Further to my comment here is a faster method which DOESN'T use looping. Use ACE.OLEDB to read the 3 columns into a temp sheet and then perform the calculation. Yes, ACE.OLEDB will open the other excel file but it doesn't open it like Excel does.
Note: The below code uses Early binding and please set a reference to the ActiveX Object Data XX.XX Library.
Option Explicit
Sub Sample()
Dim sConn As String
Dim rs As ADODB.Recordset
Dim mySQL As String, sPath As String
Dim wsI As Worksheet, wsO As Worksheet
Dim wsILRow As Long, i As Long
'~~> Change this to the relevant Excel File
sPath = "C:\MyFile.xlsx"
'~~> Change connection string if the above is not xlsx
sConn = "Provider=Microsoft.ACE.OLEDB.12.0;" & _
"Data Source=" & sPath & ";" & _
"Extended Properties=Excel 12.0"
'~~> Assuming that workbook 2 has sheet1 from where you want data
mySQL = "SELECT * FROM [Sheet1$A:C]"
Set rs = New ADODB.Recordset
rs.Open mySQL, sConn, adOpenUnspecified, adLockUnspecified
'~~> Create a temp sheeet to get the data from closed file
Set wsI = ThisWorkbook.Sheets.Add
'~~> Dump the data in the temp sheet
wsI.Range("A1").CopyFromRecordset rs
'~~> Close the recordset
rs.Close
sConn.Close
Set rs = Nothing
Set sConn = Nothing
'~~> Get last row from temp sheet
wsILRow = wsI.Range("A" & wsI.Rows.Count).End(xlUp).Row
'~~> This is where you want the output
Set wsO = ThisWorkbook.Sheets("Sheet1")
With wsO
'~~> Insert values in one go
.Range("D1:D" & wsILRow).Formula = "=(" & wsI.Name & "!A1 - " & _
wsI.Name & "!B1) * " & _
wsI.Name & "!C1"
'~~> Change formulas to values
.Range("D1:D" & wsILRow).Value = .Range("D1:D" & wsILRow).Value
End With
'~~> Delete tmep sheet
On Error Resume Next
Application.DisplayAlerts = False
wsI.Delete
Application.DisplayAlerts = False
On Error GoTo 0
End Sub