Line up shapes to have coincident edges Visio VBA - vba

Question

I have used VBA in the past mostly with excel, but I am not very experienced.
I want to cycle through multiple boxes and make each of them have coincident edges. Like they are sitting on top of each other. I am having trouble identifying the position of the first shape in my selection. I've tried a number of different objects including selection.shaperange.
Dim shp As Visio.Shape
Dim shp1 As Visio.Shape
Dim Pos As Double
Set shp1 = ActiveWindow.Selection.ShapeRange.Item
Pos = shp1.Cells("PinY")
For Each shp In Application.ActiveWindow.Selection
'Change the cell name to the one you want
If shp <> ActiveWindow.Selection.Item(1) Then
Pos = Pos + 6
End If
shp.CellsSRC(visSectionControls, visRowXFormOut, visXFormPinY).FormulaU = Pos & "mm"
Pos = shp.Cells("PinY")
Next shp
End Sub
Can you help me get the position of the first selected item and then I may be able to figure out the rest.

Answer 1

This code will abut the left sides of all but the first-selected shape with the right side of the first-selected shape:
Option Explicit
Public Sub AbutLeftsToPrimaryRight()
Dim sel As Visio.Selection
Set sel = Visio.ActiveWindow.Selection
If (sel.Count < 2) Then
Debug.Print "Select two or more shapes (Use Shift + Click)!"
GoTo Cleanup
End If
Dim shp0 As Visio.Shape
Dim shp As Visio.Shape
'// Get the selection and the primary selected shape,
'// which is item(1). See also: Selection.PrimaryItem
Set shp0 = sel(1)
'// Quick calculate the right side of shp0:
'// PinX - LocPinX + Width.
Dim dRight0 As Double
dRight0 = shp0.CellsU("PinX").ResultIU - shp0.CellsU("LocPinX").ResultIU + shp0.CellsU("Width").ResultIU
'// If shapes are rotated, flipped, or not rectangular,
'// then you'll need to use shp.BoundingBox, which
'// is more complicated
Dim dLeft As Double
Dim dx As Double, px As Double
Dim i As Integer
For i = 2 To sel.Count
'// Get the ith shape:
Set shp = sel(i)
'// Get its Pin:
px = shp.CellsU("PinX").ResultIU
'// Calculate the left side of the shape:
'// PinX - LocPinX:
dLeft = px - shp.CellsU("LocPinX").ResultIU
'// The offset:
dx = dLeft - dRight0
'// Set the new pin:
shp.CellsU("PinX").ResultIUForce = px - dx
Next i
Cleanup:
Set shp0 = Nothing
Set shp = Nothing
Set sel = Nothing
End Sub
Hope this helps!