Sample Code - Convert string To Lower or To Upper String

[C++] Convert string To Lower or To Upper String

void ToLower(WCHAR* pStr, int nLength)
{
	if (pStr)
	{
		for (int n = 0; n < nLength; n++)
		{
			if (iswupper(pStr[n]))
				pStr[n] = towlower(pStr[n]);
		}
	}
}

void ToUpper(WCHAR* pStr, int nLength)
{
	if (pStr)
	{
		for (int n = 0; n < nLength; n++)
		{
			if (iswlower(pStr[n]))
				pStr[n] = towupper(pStr[n]);
		}

	}
}

void ToLower(char* pStr, int nLength)
{
	if (pStr)
	{
		for (int n = 0; n < nLength; n++)
		{
			if (isupper(pStr[n]))
				pStr[n] = tolower(pStr[n]);
		}
	}
}

void ToUpper(char* pStr, int nLength)
{
	if (pStr)
	{
		for (int n = 0; n < nLength; n++)
		{
			if (islower(pStr[n]))
				pStr[n] = toupper(pStr[n]);
		}

	}
}