From Forum Nokia Wiki

头文件和链接库

LIBRARY  PlatformEnv.lib
#include <PathInfo.h>

获得手机内存中图片文件夹的路径

TBuf<256> cDrivePath;
// phone memory root
cDrivePath.Copy(PathInfo::PhoneMemoryRootPath());
// Images path on c drive
cDrivePath.Append(PathInfo::ImagesPath());

获得存储卡中图片文件夹的路径

TBuf<256> eDrivePath;
/* next, the MMC gallery if one exists */
//Memory Card root 
eDrivePath.Copy(PathInfo::MemoryCardRootPath());
//Images path in e drive
eDrivePath.Append(PathInfo::ImagesPath());

更多相关信息请参考:-

PathInfo Class Reference