Use Input Box To Locate Record

take a value from an input box and use it locate a record?

On my "Menu" sheet, the user will click a button which opens the input box and asks them enter a record number (format = PCAR.yy.nnn.xxxx)

The records are stored on a "Log" sheet and the lookup value is located in column "F".

I found code on another post which I used to create the input box, but don't know how to take this input and use it to find the relevant record.

I have the following code, which I use to find the first empty row in which to add a new record. if there is an error (record not found) to return to the input box to reenter the number.

Sub GetPCAR()
Dim Pcarnum
Pcarnum = InputBox("Please enter the PCAR number")
MsgBox ("Searching PCAR") & Pcarnum
End Sub

Sub AddPCAR()
Dim rNextCl As Range

Set rNextCl = Worksheets("PCAR Log").Cells(Rows.Count, 1).End(xlUp).Offset(1, 0)
Worksheets("PCAR Log").Activate
rNextCl.Select
ActiveWindow.DisplayHeadings = False
End Sub