Get the number of Audio Endpoints available for the specified device state mask. 
- 注解
 
- CoInitialize must have been called for the calling thread. See Microsoft's documentation about CoInitialize for more details. 
 
- 返回
 
- The number of Audio Endpoints available for the specified device state mask. 
 
- 参数
 
- 
  
    
| uDeviceStateMask | 
Optional bitmask used to filter the device based on their state.  |