Public Overridable Sub PreviewSetCursor( _
   ByVal _bsChannelID As String, _
   ByVal _eCursor As eMCursorType _
) 

public virtual void PreviewSetCursor( 
   string _bsChannelID,
   eMCursorType _eCursor
)

public procedure PreviewSetCursor( 
    _bsChannelID: String;
    _eCursor: eMCursorType
); virtual; 

public: virtual void PreviewSetCursor( 
   BSTR* _bsChannelID,
   eMCursorType _eCursor
) 

Parameters

_bsChannelID

channel ID. By default use empty string

_eCursor

cursor type

Here is example of how to set a cursor for preview. Note please that it is recommended to set a cursor on each mouse action, for example use MouseMove event for it:

private void panelPreview_MouseMove(object sender, MouseEventArgs e)
{
    m_objPreview.PreviewSetCursor("", eMCursorType.eMCT_CROSS);
}

Reference

MFPreviewClass Class
MFPreviewClass Members