通过

选择地址

  • 项目

下面的代码示例演示如何使用 TAPI 对象来检查可处理一组指定媒体类型要求的地址的可用电话资源。 在此示例中，音频和视频是必需的媒体。

在使用此代码示例之前，必须在 初始化 TAPI 中执行操作。

注意

此示例没有适用于生产代码的错误检查和发布。

// Declare the interfaces used to select an address.
IEnumAddress * pIEnumAddress;
ITAddress * pAddress;
ITMediaSupport * pMediaSupport;

// Use the TAPI object to enumerate available addresses.
hr = gpTapi->EnumerateAddresses( &pIEnumAddress );
// If (hr != S_OK) process the error here. 

// Locate an address that can support the media type the application needs.
while ( S_OK == pIEnumAddress->Next(1, &pAddress, NULL) )
{
    // Determine the media support.
    hr = pAddress->QueryInterface(
         IID_ITMediaSupport,
         (void **)&pMediaSupport
         );
    // If (hr != S_OK) process the error here. 

    // In this example, the required media type is already known.
    // The application can also use the address object to
    // enumerate the media supported, then choose from there.
    hr = pMediaSupport->QueryMediaType(
         TAPIMEDIATYPE_AUDIO|TAPIMEDIATYPE_VIDEO,
         &bSupport
         );
    // If (hr != S_OK) process the error here. 

    if (bSupport)
    {
        break;
    }
}
// pAddress is now a usable address.

ITTAPI：：EnumerateAddresses

ITMediaSupport

TAPIMEDIATYPE_常量