Add a reference (Project--References...) to Microsoft Word XX.0 Object Library.
XX depends on your version of MS Office i.e. 16.0 if your MS Office is 2016.
Add a command button named Command1 to form.
Add this code to form:
Option Explicit
Public WithEvents moWord As Word.Application
Private Sub Command1_Click()
' open test document
With moWord
.Documents.Open "J:\Test.docx" ' change document path according to actual file
'.WindowState = wdWindowStateNormal
.Visible = True
End With
End Sub
Private Sub Form_Load()
Set moWord = New Word.Application
End Sub
Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
If Not (moWord Is Nothing) Then Set moWord = Nothing
End Sub
Private Sub moWord_DocumentBeforeClose(ByVal Doc As Word.Document, Cancel As Boolean) Handles moWord.DocumentBeforeClose
If MsgBox("Do you really want to close the document?", vbQuestion + vbYesNo + vbDefaultButton2) = vbNo Then Cancel = True
End Sub