本文中，企图通过对一段代码实例的 Debug 过程，介绍 Windows 编程中的常见字符编码问题的解决办法。

0x01 阅读本文前请阅读以下文档

1. VS报错-TCHAR*的实参与char*的形参不兼容
2. 最近学习Windows编程总结

0x02 问题代码

#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#define INFO_BUFFER_SIZE 32767
void printError(TCHAR* msg);
void main()
{
    TCHAR  infoBuf[INFO_BUFFER_SIZE];
    DWORD  bufCharCount = INFO_BUFFER_SIZE;
    // Get and display the system directory. 
    if (!GetSystemDirectory(infoBuf, INFO_BUFFER_SIZE))
        printError(TEXT("GetSystemDirectory"));
    _tprintf(TEXT("\nSystem Directory:   %s"), infoBuf);
}
void printError(TCHAR* msg)
{
    DWORD eNum;
    TCHAR sysMsg[256];
    TCHAR* p;
    eNum = GetLastError();
    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL, eNum,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        sysMsg, 256, NULL);
    // Trim the end of the line and terminate it with a null
    p = sysMsg;
    while ((*p > 31) || (*p == 9