Find Function: Give The VRow Variable The Value Or The Row That The Text From Text Box Is On

I am using the following code.

Function VLOOKUPRow()
Dim SV As Object
Worksheets("Midterm").Select
SV = "UserFormAppend.TextBoxInvID.Text"
VRow = Columns(1). Find(What:="SV", After:= Cells(1, 1), _
LookIn:=xlValues, SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, MatchCase:=True).Row
MsgBox (VRow)
End Function

I am trying to give the VRow variable the value or the row that The text from my text box is on. How do you make the what look for a variable. I can get it to work if i put a constent in the what. how to make the what look for a variable. I'm new at this forum thing so im not quite sure how to check for answers.