系统路径函数应用小杂烩

  #include "shlobj.h" //包含头文件

WINSHELLAPI HRESULT WINAPI SHGetSpecialFolderLocation (HWND hwndOwner, int nFolder,LPITEMIDLIST * ppidl); //函数声明 用于根据nFolder的值 获得系统特殊路径，然后配合 SHGetPathFromIDList（）将一个项目标识列表转换为文件系统路径：

TCHAR szAppdata[1024] = {0};

LPITEMIDLIST  ppidl;  

SHGetSpecialFolderLocation( NULL, CSIDL_COMMON_APPDATA, &ppidl);

SHGetPathFromIDList(ppidl,szAppdata);

SHGetSpecialFolderPath（）功能跟上面那段代码相似，检索一个由CSIDL值指定的特殊文件夹的路径并返回。CSIDL的取值，详细情况查阅MSDN

SHGetFolderLoaction()；

SHGetFolderPath()；用法参见MSDN

GetTempPath();获取系统临时文件

int main()
{
HANDLE hFile;
HANDLE hTempFile; 
DWORD dwRetVal;
DWORD dwBytesRead;
DWORD dwBytesWritten; 
DWORD dwBufSize=BUFSIZE;
UINT uRetVal;
char szTempName[BUFSIZE];  
char buffer[BUFSIZE]; 
char lpPathBuffer[BUFSIZE];
BOOL fSuccess;


// Open the existing file. 
hFile = CreateFile("original.txt",        // file name 
GENERIC_READ,          // open for reading 
0,                     // do not share 
NULL,                  // default security 
OPEN_EXISTING,         // existing file only 
FILE_ATTRIBUTE_NORMAL, // normal file 
NULL);                 // no template 
if (hFile == INVALID_HANDLE_VALUE) 
{ 
printf ("CreateFile failed with error %d.\n", 
GetLastError());
return (1);
} 


// Get the temp path.
dwRetVal = GetTempPath(dwBufSize,     // length of the buffer
lpPathBuffer); // buffer for path 
if (dwRetVal > dwBufSize || (dwRetVal == 0))
{
printf ("GetTempPath failed with error %d.\n", 
GetLastError());
return (2);
}


// Create a temporary file. 
uRetVal = GetTempFileName(lpPathBuffer, // directory for tmp files
"NEW",        // temp file name prefix 
0,            // create unique name 
szTempName);  // buffer for name 
if (uRetVal == 0)
{
printf ("GetTempFileName failed with error %d.\n", 
GetLastError());
return (3);
}


// Create the new file to write the upper-case version to.
hTempFile = CreateFile((LPTSTR) szTempName, // file name 
GENERIC_READ | GENERIC_WRITE, // open r-w 
0,                    // do not share 
NULL,                 // default security 
CREATE_ALWAYS,        // overwrite existing
FILE_ATTRIBUTE_NORMAL,// normal file 
NULL);                // no template 
if (hTempFile == INVALID_HANDLE_VALUE) 
{ 
printf ("CreateFile failed with error %d.\n", 
GetLastError());
return (4);
} 


// Read BUFSIZE blocks to the buffer. Change all characters in 
// the buffer to upper case. Write the buffer to the temporary 
// file. 
do 
{
if (ReadFile(hFile, 
buffer, 
BUFSIZE, 
&dwBytesRead, 
NULL)) 
{ 
CharUpperBuff(buffer, dwBytesRead); 
fSuccess = WriteFile(hTempFile, 
buffer, 
dwBytesRead,
&dwBytesWritten, 
NULL); 
if (!fSuccess) 
{
printf ("WriteFile failed with error %d.\n", 
GetLastError());
return (5);
}
} 
else
{
printf ("ReadFile failed with error %d.\n", 
GetLastError());
return (6);
}
} while (dwBytesRead == BUFSIZE); 


// Close the handles to the files.
fSuccess = CloseHandle (hFile);
if (!fSuccess) 
{
printf ("CloseHandle failed with error %d.\n", 
GetLastError());
return (7);
}
fSuccess = CloseHandle (hTempFile);
if (!fSuccess) 
{
printf ("CloseHandle failed with error %d.\n", 
GetLastError());
return (8);
}


// Move the temporary file to the new text file.
fSuccess = MoveFileEx(szTempName, 
"allcaps.txt", 
MOVEFILE_REPLACE_EXISTING);
if (!fSuccess)
{ 
printf ("MoveFileEx failed with error %d.\n", GetLastError());
return (9);
}
return (0);
}

GetModuleFileName（）；检索的文件的完全限定路径包含指定的模块。该模块必须在当前进程加载

LPITEMIDLIST   idl=SHBrowseForFolder(&bi);   //打开文件夹选择框
if(idl == NULL)   
{
return NULL;
}
SHGetPathFromIDList(idl,FileName);