ini write

LPTSTR lpPath = new char[MAX_PATH];
strcpy(lpPath,"D:\\b.ini");

WritePrivateProfileString("LiMing","Sex","Man",lpPath);
WritePrivateProfileString("LiMing","Age","12",lpPath);

WritePrivateProfileString("ZhangSan","Sex","Women",lpPath);
WritePrivateProfileString("ZhangSan","Age","32",lpPath);

delete [] lpPath;

result

File reading

// TODO: Add control notification handler code here
	CDialogEx::OnOK();
	LPTSTR lpPath = new char[MAX_PATH];
	LPTSTR LiMingSex = new char[6];
	int LiMingAge;
	LPTSTR ZhangSanSex = new char[6];
	int ZhangSanAge;
	strcpy(lpPath,"E:\\b.ini");
	GetPrivateProfileString("LiMing","Sex","",LiMingSex,6,lpPath);
	LiMingAge = GetPrivateProfileInt("LiMing","Age",0,lpPath);

	GetPrivateProfileString("ZhangSan","Sex","",ZhangSanSex,6,lpPath);
	ZhangSanAge = GetPrivateProfileInt("ZhangSan","Age",0,lpPath);

Method analysis

/*Read the integer value of the ini file
		UINT GetPrivateProfileInt(
 			  LPCTSTR lpAppName, // A field name [section name] in the INI file can have many section names
 			  LPCTSTR lpKeyName, // A key name under lpAppName, which is the specific variable name inside
 			  INT nDefault, // If the specified data is not found to return, the variable value is assigned to the return value
  			   LPCTSTR lpFileName // Path of INI file
		);
	*/
/* Read ini file string
		DWORD GetPrivateProfileString( 
			 LPCTSTR lpAppName, // A field name [section name] in the INI file can have many section names (section name of the configuration file)
			 LPCTSTR lpKeyName, // A key name under lpAppName, which is the specific variable name (key name of the configuration file)
 			  LPCTSTR lpDefault, // If lpReturnedString is empty, assign this variable to lpReturnedString
  			   LPTSTR lpReturnedString, // The pointer variable that stores the key value is used to receive the receiving buffer of the key value (data) in the INI file
  			   DWORD nSize, // buffer size of lpReturnedString
  			   LPCTSTR lpFileName // Path of INI file
		);
	*/