trying to get value from cell -1 from target.column

excel 2010 vba

I have an event:
xlApp_SheetSelectionChange(ByVal Sh As Object, ByVal Target As Range)

where my "Target"
is being passed into the procedure.

What I need:

I determine the value of the Target.Column value  ....by passing a variable
mRangeColumn (this is the Column Number example "6")

Once I determine what value " Target.Value" is...
I want to get the value to the left of Target.Value

Dim strNameBox As Range
Dim strColumnBox As Integer

        On Error Resume Next
        If Target.Column = "" Then
            If Target.Column = mRangeColumn Then
                
             strColumnBox = Target.Column - 1 
                
 strNameBox.Column = strColumnBox <------ error here
"wrong number of arguments or invalid property assignment"

                
               UserForm2.TextBox1.Value = Target.Value
               UserForm2.ComboBox1.Value = strNameBox.Value
            Else
                ' code
            End If
        Else
            ' code
        End If

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