directory

GetWindowsDirectory　　　　　　->　　　　　　c:\windows or c:\

GetTempPath　　　　　　　　　　 ->　　　　　　CurrentUser::%Tmp% || System::%Tmp% || CurrentUser::%Temp% || System::%Temp%

 

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SHGetKnownFolderPath

Do Not use environment string for well-known directory any more, use this function instead.

#include <shlobj.h>

wchar_t *fullpath = NULL;
SHGetKnownFolderPath(FOLDERID_ProgramFiles, 0, NULL, &fullpath);          // C:\Program Files
CoTaskMemFree(fullpath);