How to restart a code upon vbno

[FARAZ QURESHI]

I have the following piece of code and want to restart the procedure if the
user inserts nothing OR zero in the first inputbox and then clicks "No" on
the proceeding MsgBox.

Please highlight, what is wrong with the code?

Public Sub CNV()
Dim check12 As Double
check12 = Application.INPUTBOX (prompt:="Input Dollar Conversion Rate",
Type:=1)
If check12 Is Nothing Then
fb = MsgBox("You have not inserted anything. You want to continue?",
vbYesNo)
If fb = vbYes Then
ActiveCell = "=A1*" & check
Else: GoTo check12
End If
End If
End Sub

 

[CurlyDave]

Try this
Sub CNV()
Dim c As Integer
On Error GoTo ExitProc
c = InputBox("Enter Value")
ActiveCell = "=A1*" & c
Exit Sub
ExitProc:
fb = MsgBox("You have not inserted anything. You want to
continue?", vbYesNo)
If fb = vbYes Then CNV
If fb = vbNo Then Exit Sub

End Sub

 

[FARAZ QURESHI]

XCLENT!
By the way upon entering Zero the code continues. How 2 insert an OR
condition to check whether the No value or Zero was inserted?