GetSystemDirectory和CreateFile

#include <Windows.h>
#include <stdio.h>

int main()
{
    
    HANDLE hFile;
    DWORD dwWritten;
    TCHAR szSystemDir[MAX_PATH];
    GetSystemDirectory(szSystemDir,MAX_PATH);

    printf("%s\n",szSystemDir);

    hFile = CreateFile(L"systemroot.txt",
        GENERIC_WRITE,
        0,NULL,CREATE_ALWAYS,
        FILE_ATTRIBUTE_NORMAL,
        NULL);
    if(hFile != INVALID_HANDLE_VALUE)
    {
        if(!WriteFile(hFile,szSystemDir,lstrlen(szSystemDir),&dwWritten,NULL))
        {
            return GetLastError();
        }
    }
    CloseHandle(hFile);
    system("pause");
    return 0;
}