PlaylistBackgroundSet Method (MPlaylistClass)

VB.Net
C#
Delphi
C++

Public Overridable Sub PlaylistBackgroundSet( _
   ByVal _pExternOrRef As Object, _
   ByVal _bsPath As String, _
   ByVal _bsParam As String, _
   ByRef _ppPlaylistItem As MItem _
)

public virtual void PlaylistBackgroundSet( 
   object _pExternOrRef,
   string _bsPath,
   string _bsParam,
   out MItem _ppPlaylistItem
)

public procedure PlaylistBackgroundSet( 
    _pExternOrRef: TObject;
    _bsPath: String;
    _bsParam: String;
   Out  _ppPlaylistItem: MItem
); virtual;

public: virtual void PlaylistBackgroundSet( 
   IUnknown* _pExternOrRef,
   BSTR* _bsPath,
   BSTR* _bsParam,
   [PARAMFLAG::Out] MItem* _ppPlaylistItem
)

Parameters

_pExternOrRef

reference to external object (for example, live source)

_bsPath

path to source.
Possible values:

color name ("red") or #RRGGBB color code;
"transparent" for transparent background;
path to media file or playlist.
empty string to be able to see the last frame of playlist.

_bsParam

additional parameters string

_ppPlaylistItem

background playlist MItem object

Here is example of how to initialize playlist and set a file as its background:

Visual Basic
C#
Delphi

Dim myPlaylist As New MPlaylistClass()
myPlaylist.PreviewWindowSet("", panelPreview.Handle.ToInt32())
myPlaylist.PreviewEnable("", 1, 1)
myPlaylist.ObjectStart(New Object())
Dim pFile As MItem
Dim strPath As String = "d:\clips\SampleClip1.wmv"
myPlaylist.PlaylistBackgroundSet(Nothing, strPath, "", pFile)
myPlaylist.FilePlayStart()

MPlaylistClass myPlaylist = new MPlaylistClass();
myPlaylist.PreviewWindowSet("", panelPreview.Handle.ToInt32());
myPlaylist.PreviewEnable("", 1, 1);
myPlaylist.ObjectStart(new object());
MItem pFile;
string strPath = @"d:\clips\SampleBackClip1.wmv";
myPlaylist.PlaylistBackgroundSet(null, strPath, "", out pFile);
myPlaylist.FilePlayStart();

var
nIndex: integer;
pItem: MItem;
myPlaylist: MPlaylist;
myPreview: IMPreview;
myEvents: TEvents;
myFile:IMFile;
myObject:IMObject;
cookie: LONG_PTR;
begin
myPlaylist:= CreateComObject(CLASS_MPlaylist) as MPlaylist;
myPreview:= myPlaylist as IMPreview;
myObject:= myPlaylist as IMObject;
myEvents:=TEvents.Create();
myObject.ObjectCallbackSet(myEvents, cookie);
myFile:=myPlaylist as IMFile;
myPreview.PreviewWindowSet('', panelPreview.Handle);
myPreview.PreviewEnable('', 1, 1);
myPlaylist.PlaylistBackgroundSet(nil, 'c:\myBackFile.avi', '', pItem);
myFile.FilePlayStart();
end;

Reference

MPlaylistClass Class
MPlaylistClass Members