哪位能人能帮忙详细解释下下面几段代码是什么意思，谢谢了！

AnsiString sIniFile = ChangeFileExt(Application->ExeName, ".ini");
TIniFile *pIniFile = new TIniFile(sIniFile);
sCOMPort= pIniFile->ReadString("Global", "port", "");

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AnsiString sIniFile = ChangeFileExt(Application->ExeName, ".ini");
if (!(FileGetAttr(sIniFile) & faReadOnly) || !FileExists(sIniFile))
{
TIniFile *pIniFile = new TIniFile(sIniFile);
pIniFile->WriteString("Global", "port", sComport);

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HANDLE hCom = CreateFile("COM1",GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);

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bWriteStat = WriteFile(hCom,"hello",5,&nLen,NULL);
if (!bWriteStat)
{
MessageBox("通讯失败，请检查串口设置是否正确！","系统提示");
}