How to Implement Formula into Excel cells using VBA - vba

Question

I want to implement the following formula in to Excel cells
IF(OR(D12>0,C13=""),"",MAX(SUM($C$12:C13)-$D$9,0))
(once formula is applied I should get following result (formula implemented manually):
so i wrote simple macro as below , but unable to implement formula , formula retuns value as "true"
Sub adjustoldbills()
lastRow_sht4 = Sheet4.Range("A" & Rows.Count).End(xlUp).Row
Sheet4.Cells(12, 11) = ""
For i = 1 To lastRow_sht4 - 10
If Sheet4.Cells(11 + i, 1) <> "" Then
'=MAX(SUM($C$12:C15)-$D$9,0)
Sheet4.Cells(12, 4).Formula = "=MAX(SUM($C$12:C" & 12 & ")-$D$9,0)"
Sheet4.Cells(11 + i, 4).Formula = "=(if(or(D" & 11 + i > 0 & ",C" & 12 + i & "=" & Chr(34) & Chr(34) & ")," & Chr(34) & Chr(34) & "," & "MAX(SUM($C$12:C" & 12 & i & ")-$D$9,0)"
End If
Next i
End Sub
i am getting wrong result after implemented formula via vba macro as in this image:
how to implement formula and get value as expected.

Answer 1

When trying to convert long formulas to VBA try using a String variable to help you test it.
Dim FormulaStr As String
FormulaStr = "=IF(OR(D" & 11 + i & ">0,C" & 12 + i & "=" & Chr(34) & Chr(34) & ")," & _
Chr(34) & Chr(34) & ",MAX(SUM($C$12:C" & 12 + i & ")-$D$9,0))"
Debug.Print FormulaStr
Then, in the immediate window you will get:
=IF(OR(D12>0,C13=""),"",MAX(SUM($C$12:C13)-$D$9,0))
which is the formula you want to convert to VBA.
Now all you need to do is to add the line below:
Sheet4.Cells(11 + i, 4).Formula = FormulaStr
If you want to skip the String variable, you can just replace your line of
Sheet4.Cells(11 + i, 4).Formula = "=(if(or(D" & 11 + i > 0 & ",C" & 12 + i & "=" & Chr(34) & Chr(34) & ")," & Chr(34) & Chr(34) & "," & "MAX(SUM($C$12:C" & 12 & i & ")-$D$9,0)"
to:
Sheet4.Cells(11 + i, 4).Formula = "=IF(OR(D" & 11 + i & ">0,C" & 12 + i & "=" & Chr(34) & Chr(34) & ")," & Chr(34) & Chr(34) & ",MAX(SUM($C$12:C" & 12 + i & ")-$D$9,0))"

Answer 2

I'd go another way, with no loops and exploiting SpecialCells() method of Range object
Option Explicit
Sub adjustoldbills()
With Sheet4
.Range("D12").FormulaR1C1 = "=MAX(RC[-1]-R9C4,0)"
With .Range("A13", .Cells(.Rows.Count, 1).End(xlUp)).SpecialCells(xlCellTypeConstants)
With .Offset(, 2).SpecialCells(xlCellTypeConstants)
.Offset(, 1).FormulaR1C1 = "=IF(R[-1]C>0,"""",MAX(SUM(R12C[-1]:RC[-1])-R9C4,0))"
With .Areas(.Areas.Count)
.Offset(, 1).Cells(.Rows.Count).Offset(1).FormulaR1C1 = "=IF(R[-1]C>0,"""",MAX(SUM(R12C[-1]:RC[-1])-R9C4,0))"
End With
End With
End With
End With
End Sub