| Microsoft DirectX 9.0 |
The AddPort method assigns a port to the performance. This method is valid only for performances that do not use audiopaths. Such performances are initialized by using IDirectMusicPerformance8::Init.
Syntax
HRESULT AddPort(
IDirectMusicPort* pPort
);
Parameters
pPort
IDirectMusicPort8 interface pointer of the port to add. If NULL, the default port is added. See Remarks.
Return Values
If the method succeeds, the return value is S_OK.
If it fails, the method can return one of the error values shown in the following table.
| Return code |
| DMUS_E_CANNOT_OPEN_PORT |
| DMUS_E_NOT_INIT |
| E_OUTOFMEMORY |
| E_POINTER |
Remarks
When the default port is specified by passing NULL in pPort, it is assigned one channel group. If no
If pPort is not NULL, it must be a port created by the same DirectMusic object that was passed to, or created by, IDirectMusicPerformance8::Init. The port must be activated by a call to IDirectMusicPort8::Activate, and a block of channels must be assigned by a call to IDirectMusicPerformance8::AssignPChannelBlock.
This method creates a reference to IDirectMusicPort8 that is released by IDirectMusicPerformance8::RemovePort or IDirectMusicPerformance8::CloseDown. However, if NULL is passed to AddPort, the port cannot be removed by RemovePort, because the application has no reference to pass to RemovePort.
Requirements
Header: Declared in dmusici.h.
See Also