在pocket pc下，刚开始考虑使用接口phoneGetDevCaps()获得PDA的生产厂商、模块标识等信息，可是返回的phoneInfo为空，phoneName为Cellur Phone。请问是不是用这个接口；如果是，用这个接口时该注意哪些问题？谢谢！
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如果你的只是是PPC而不是 PPC Phone的话这个函数是起不了作用的。
This function queries a specified phone device to determine its telephony capabilities.
GetSystemInfo可能能有些用，记不太清楚了。
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使用的函数应该没错。检查一下其他地方。
下面摘自MSDN:
PHONECAPS Structure
The PHONECAPS structure describes the capabilities of a phone device. The phoneGetDevCaps and TSPI_phoneGetDevCaps functions return this structure.
Members
dwProviderInfoOffset
Offset from the beginning of the structure to the variably sized field containing service provider-specific information.
This member provides information about the provider hardware and/or software, such as the vendor name and version numbers of hardware and software. This information can be useful when a user needs to call customer service with problems regarding the provider. The size of the field is specified by dwProviderInfoSize.
http://msdn2.microsoft.com/en-us/library/ms736603.aspx