Choose the starting cell of a do-loop - excel

Question

I want to start a loop mid column (Row 15 let's say).
Current code (part of a much larger script)
Range("C2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C3"
Dim BlankFound As Boolean
Dim x As Long
'Loop until a blank cell is found in Column C
Do While BlankFound = False
x = x + 1
If Cells(x, "C").Value = "" Then
BlankFound = True
End If
Loop
I tried changing the column ref (C) to a cell (C15). I tried to specify the start and end point (C15:C).
We have a client order form that when they click a button converts to another format ready to be uploaded. The client will fill out various fields that populate rows 1 and 2 (name, address, etc.), then from row three it is the number of orders, i.e.
row
3 part number quantity availability
4 part number quantity availability
I want it to look at the original form and only populate down if it finds a value in the original form's cell.
Then at the end I have another row to add, so I need to be able to say when this loop finishes, add these values (these are just an extra row of totals and some formatting).
The full code-
Sub ButtonMacroLatest()
'Hide alerts
Application.DisplayAlerts = False
'
' Macro8 Macro
'
'Save to users device
ChDir "U:\WINDOWS"
ActiveWorkbook.SaveAs Filename:="U:\WINDOWS\OrderForm.xlsx", FileFormat:= _
xlOpenXMLWorkbook, CreateBackup:=False
'Create new workbook and populate
Workbooks.Add
ActiveCell.FormulaR1C1 = "MSG"
Range("B1").FormulaR1C1 = "=[OrderForm.xlsx]Order!R[1]C"
Range("C1").FormulaR1C1 = "=[OrderForm.xlsx]Order!R[1]C[3]"
Range("D1").FormulaR1C1 = "1400008000"
Range("E1").FormulaR1C1 = "501346009175"
Range("F1").FormulaR1C1 = "=TODAY()"
Range("G1").FormulaR1C1 = "=Now()"
Selection.NumberFormat = "[$-x-systime]h:mm:ss AM/PM"
Range("A2").FormulaR1C1 = "HDR"
Range("B2").FormulaR1C1 = "C"
Range("C2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R4C2"
Range("G2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R[1]C[3]"
Range("H2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R2C4"
Range("K2").FormulaR1C1 = "STD"
Range("L2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R5C2"
Range("N2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R7C2"
Range("O2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R8C2"
Range("Q2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R9C2"
Range("R2").FormulaR1C1 = "=[OrderForm.xlsx]Order!R12C2"
Range("A3").FormulaR1C1 = "POS"
Range("B3").FormulaR1C1 = "=Row()*10-20"
Range("C3").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C3"
Dim BlankFound As Boolean
Dim x As Long
'Loop until a blank cell is found in Column C
Do While BlankFound = False
x = 14
x = x + 1
If Cells(x, "C").Value = "" Then
BlankFound = True
End If
Loop
Range("D3").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C1"
Range("E3").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C2"
Range("F3").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C5"
Range("G3").FormulaR1C1 = "=[OrderForm.xlsx]Order!R15C7"
'Preformat cells to remove 0 value
Range("A1:AP1000").Select
Range("AP1000").Activate
Selection.NumberFormat = "#;#;"
Range("H3").FormulaR1C1 = "GBP"
Range("L3").FormulaR1C1 = "TRA"
Range("M3").FormulaR1C1 = "=COUNTIF(C[-3], ""POS"")+COUNTIF(C[-3], ""HDR"")"
'Reinstate alerts
Application.DisplayAlerts = True
End Sub
In the client facing form A15:C15 are material/part numbers. If populated those rows should fill down in the new form until there is no entry in the original form.
Customer form

Answer 1

I haven't been able to figure out exactly where you're grabbing values from and where you're putting them, but hopefully this bit of code will give you enough ideas to get yours sorted.
Public Sub ButtomMacroLatest()
Dim wrkBk As Workbook
Dim wbOF As Workbook
Dim shtCSV As Worksheet
Dim shtOF As Worksheet
Dim lLastRow As Long
Dim x As Long, y As Long
'OrderForm is closed so needs opening:
'Set wbOF = Workbooks.Open("U:\.......\OrderForm.xlsx")
'OrderForm is the workbook containing this code:
Set wbOF = ThisWorkbook
'Set a reference to the "Order" sheet and
'find the last row - based on column A being populated.
Set shtOF = wbOF.Worksheets("Order")
lLastRow = shtOF.Cells(Rows.Count, 1).End(xlUp).Row
'Create workbook with 1 sheet and set reference to that sheet.
Set wrkBk = Workbooks.Add(xlWBATWorksheet)
Set shtCSV = wrkBk.Worksheets(1)
'Add headings to the sheet.
shtCSV.Range("A1:G1") = Array("MSG", "SomeHeading", "SomeOtherHeading", "1400008000", _
"501346009175", Date, Now)
'Copy values in cell "A15:J<LastRow>" to "A2" on the new sheet.
With shtOF
'Straight copy
'.Range(.Cells(15, 1), .Cells(lLastRow, 10)).Copy _
Destination:=shtCSV.Range("A2")
'Paste Special
.Range(.Cells(15, 1), .Cells(lLastRow, 10)).Copy
With shtCSV.Range("A2")
.PasteSpecial xlPasteValuesAndNumberFormats
.PasteSpecial xlPasteFormats
End With
'Make the value of one cell equal the value of another cell
'in a loop from row 15 to LastRow and column 1 to 10.
'For x = 15 To lLastRow
' For y = 1 To 10
' shtCSV.Cells(x - 13, y) = .Cells(x, y)
' Next y
'Next x
End With
wrkBk.SaveAs Environ("temp") & "/CSV File.csv", FileFormat:=xlCSV, CreateBackup:=False
End Sub

Answer 2

This took something a lot simpler, it works a treat for what I need. Code:
'Fills column to last row of data from Cell C15
Dim LastRow As Long
LastRow = Cells.Find(What:="*", SearchOrder:=xlByRows, SearchDirection:=xlPrevious).Row
Range("C15:C" & LastRow).FillDown
Range("D15:D" & LastRow).FillDown
Range("E15:E" & LastRow).FillDown
Thanks for all of the responses.