need help in search record

hey all ..hope u all enjoyed the xmas holidays....
I wann some help here..
I wanna search a record.
But i wanna wildcat search by three methods..ie.. search in name coloumn or search by ID or search by Payroll ID column(name/ Id/ Pay ID are three columns in the table for this form)

For that i created a
search field ---->Search
combo box to select Name or ID----->Combo107
and a command button to search the field -->Command109
but i dont know how to modify the VBcode
my code is as follows

I know that i need to change the line starting with stLinkCriteria = "[=[Combo107]] Like " & "'*" & ...
---------------------------------------------
Private Sub Command109_Click()
On Error GoTo Err_Command109_Click

Dim stDocName As String
Dim stLinkCriteria As String

stDocName = "x-Contract Finder"

stLinkCriteria = "[=[Combo107]] Like " & "'*" & Me![search] & "*'"
DoCmd.OpenForm stDocName, , , stLinkCriteria

Exit_Command109_Click:
Exit Sub

Err_Command109_Click:
MsgBox Err.Description
Resume Exit_Command109_Click

End Sub