Find and Replace from UserForm

[ePrizer]

I'm using Visio 2003 and have created a Userform with multiple text fields. I'd like the Submit button when clicked to Find a value throught all my diagrams and then replace that value with what was inputted by the User in the associated text field.

Any help would be much appreciated.

Here's what I tried and keep getting this error:

run time error 424'
object required

 
Selection.Find.ClearFormatting
With Selection.Find
    .Text = "[Promotion Name]"
    .Replacement.Text = TextBox1.Value
    .Forward = True
    .Wrap = wdFindContinue
    .Format = False
    .MatchCase = False
    .MatchWholeWord = False
    .MatchWildcards = False
    .MatchSoundsLike = False
    .MatchAllWordForms = False
End With
Selection.Find.Execute

[ePrizer]

The last code was find and replace for MS word

[Code]
Dim iDocumentCount As Integer
iDocumentCount = Documents.Count
Dim iPageCount As Integer
iPageCount = Documents(1).Pages.Count
Dim iCurrentPage As Integer
For iCurrentPage = 1 To iPageCount
iShapeCount = Documents(1).Pages(iCurrentPage).Shapes.Count
Dim iCurrentShape As Integer
For iCurrentShape = 1 To iShapeCount
Documents(1).Pages(iCurrentPage).Shapes(iCurrentShape).Text = Replace(Documents(1).Pages _
(iCurrentPage).Shapes(iCurrentShape).Text, "CHECK ME", TextBox1.Text)
Next
Next
[/VBA]