问题
I am attempting to use a VBA UserForm to edit an ActiveX label in a PowerPoint Presentation (which will serve as a textbox).  I can't determine how to reference the label, however, and could use some direction.  I have tried variations of 
Presentations("Combined Staff Agenda Template").Slides(0).Shapes("Date_Label").Value = LabelDate, 
but I still receive an error.  The ActiveX label is on the first slide of the "Combined Staff Agenda Template" presentation, and is named "Date_Label".
回答1:
Presentations("Combined Staff Agenda Template").Slides(0) _
                     .Shapes("Date_Label").OLEFormat.Object.Caption = LabelDate
    来源:https://stackoverflow.com/questions/22821389/vba-reference-label-in-powerpoint-presentation-with-userform