What is the syntax to open a userform?

Put the code below in a separate module from that of the userform. A common choice for users is the proceduce of Workbook_Open() under module ThisWorkbook.

Private Sub Workbook_Open()
    <user form name>.Show
End Sub

Do not use the load method, as this just loads the form but does not make it visible. Besides, Show option automatically loads it anyway.

Load <user form name>