include Push-Pin on prop. manager page API

To get the push-pin to appear you need to include swPropertyManagerOptions_PushpinButton as one of the bitmap values passed as the second argument to CreatePropertyManagerPage:
(1) To get the definition of swPropertyManagerOptions_PushpinButton you could add the following enum to the swConst
Public Enum swPropertyManagerButtonTypes_e swPropertyManagerOptions_OkayButton = &H1 swPropertyManagerOptions_CancelButton = &H2 swPropertyManagerOptions_LockedPage = &H4 swPropertyManagerOptions_CloseDialogButton = &H8 swPropertyManagerOptions_MultiplePages = &H10 swPropertyManagerOptions_PushpinButton = &H20 End Enum
Alternatively, as you need SW2004 for API pushpins anyway, in the Reference dialog box on the Tools menu in the VB editor search for check box labelled Solidworks Constant type library and make sure it is checked. That will give your macro access to the definitions from swconst.tlb. Then you can dump the file swConst from the sample.
(2) Then edit the code in PropMgr
'Set some variables for the Page title = "Sample PropertyManager" buttonTypes = swPropertyManagerOptions_OkayButton + swPropertyManagerOptions_CancelButton + swPropertyManagerOptions_PushpinButton
'Create the PropertyManagerPage Set m_Page = swApp.CreatePropertyManagerPage(title, buttonTypes, pageHdlr, errors)
The property Pinned controls whether the pin is pushed in or out once you get it to appear.