Procedure in VB

I have a procedure named
Private Sub Mark_To_Delete(TT_No As Integer, TT_Type As String)

When I try to call Mark_To_Delete(1, “TT”)
Give Error
**
VB Compiler Error
Required: =
**

But If
Private Sub Mark_To_Delete(TT_No As Integer)
& then try to call Mark_To_Delete(1)
all works fine

How can I pass 2 parameter.