Prompting for password when trying to open out of company

I wish to apply a password for internal documents (PPTX, DOCX, XLSX..) , that will not be opened out of company.
I assume should be some some Window Log-In validation.

Please your help with the code..

Quote from jonny

I wish to apply a password for internal documents (PPTX, DOCX, XLSX..) , that will not be opened out of company.
I assume should be some some Window Log-In validation.

Please your help with the code..

Here is it to all that may be interested in Excel:

Private Sub Workbook_Open()
    Dim pass, valid As String
    
    Windows(ThisWorkbook.Name).Visible = False


    pass = "XXX"
    valid = InputBox("Password?")


    If Environ("USERDOMAIN") <> "YYY" Or valid <> pass Then
        ThisWorkbook.Saved = True
        ThisWorkbook.Close
    Else
        Windows(ThisWorkbook.Name).Visible = True
    End If
End Sub

Any idea for a same solution in PPT and DOC files?