Unlock with macro when read-only in PowerPoint - vba

Question

I want to remove read-only using a PowerPoint macro.
I'm writing a macro that fires when a file is opened.
In that macro, there is a process to delete a specific shape.
The PowerPoint file has a write lock.
Given the above assumptions, when you open the file read-only
The macro will be executed, but an error will occur because it is read-only and the shape cannot be deleted.
So I unlock the read-only lock when the macro is executed
When I'm done deleting a particular shape, I want to lock it again for read-only.
Is there such a way?
I know the write lock password.
Public Sub Ribbon_onLoad(ribbon As IRibbonUI)
Const EXP_DATE As Date = "2021/09/30"
Dim NOW_DATE As Date: NOW_DATE = Format(Date, "yyyy/mm/dd")
Dim pp As PowerPoint.Presentation: Set pp = ActivePresentation
If NOW_DATE <= EXP_DATE Then
MsgBox "OK!"
Call DeleteShapesWithName("expShape")
Else
MsgBox "No!Exp!：" + Format(EXP_DATE, "yyyy/mm/dd")
'ActivePresentation.Close
End If
End Sub
Sub DeleteShapesWithName(ByVal targetName As String)
Dim sld As Slide
Dim shp As Shape
Dim i As Long
i = 1
For Each sld In Application.ActivePresentation.Slides
Do Until i > sld.Shapes.Count
If sld.Shapes(i).Name = targetName Then
sld.Shapes(i).Delete
Else
i = i + 1
End If
Loop
Next
End Sub
------add
I added the modified source after receiving the reply.
Public Sub Ribbon_onLoad(ribbon As IRibbonUI)
Call UnlockPresentation
End Sub
Sub UnlockPresentation()
Dim oPVW As ProtectedViewWindow
Dim oPres As Presentation
Set oPVW = ProtectedViewWindows.Open("C:\test\example_exp.pptm")
oPVW.Edit ModifyPassword:="test"
Call DeleteShapesWithName("expShape")
'Do stuff here
End Sub
Sub DeleteShapesWithName(ByVal targetName As String)
Dim sld As Slide
Dim shp As Shape
Dim i As Long
i = 1
For Each sld In Application.ActivePresentation.Slides
Do Until i > sld.Shapes.Count
If sld.Shapes(i).Name = targetName Then
sld.Shapes(i).Delete
Else
i = i + 1
End If
Loop
Next
End Sub

Answer 1

Here's code to open a read-only presentation so you can modify it. No need to reset the password, just replace "Test" with the actual password. Where the Do stuff here comment is, you can use the ActivePresentation keyword to modify the file:
Sub UnlockPresentation()
Dim oPVW As ProtectedViewWindow
Dim oPres As Presentation
Set oPVW = ProtectedViewWindows.Open("C:\HasModPW.pptx")
oPVW.Edit ModifyPassword:="ExistingModificationPassword"
'Do stuff here
End Sub
Please note: Microsoft's help page on ProtectViewWindow.Edit is wrong. The page currently states this method changes the password, but it actually provides the PW to make editing possible,