《Windows API》创建文件写入系统目录路径

UINT WINAPI GetSystemDirectory(  _Out_ LPTSTR lpBuffer,  _In_  UINT   uSize);

#include<Windows.h>#include<stdio.h>#include<stdlib.h>int main() {    HANDLE hFile;    TCHAR buffer[MAX_PATH];    DWORD writeNum;    GetSystemDirectoryA(buffer, MAX_PATH);    hFile = CreateFile("haha.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);    if (hFile != INVALID_HANDLE_VALUE) {        if (!WriteFile(hFile, buffer, lstrlen(buffer), &writeNum, NULL)) {        }        return GetLastError();    }    CloseHandle(hFile);    system("pause");    return 0;}