How can I find the memory available on an SD card on a wince device (C++)

I'm look开发者_如何学JAVAing for a way (on a pocketPC) to interrogate the size/remaining size of an SD card.

I have to create some files on the SD card and I want to make sure there's enough room before I write to it.

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Look at GetDiskFreeSpaceEx() : http://msdn.microsoft.com/en-us/library/aa912270.aspx