byte to const char * conversion error

I have the function below.  It fails to compile with the following error:
u:\myDll\WinNetTools.c(151): error C2664: 'strlen' : cannot convert parameter 1 from 'BYTE [20]' to 'const char *'

The error is referring to this line:
   int iPos = strlen(psClientAddr->Address) == 4 ? 0 : 2;
   char* pszIP = inet_ntoa(*((struct in_addr *)(&psClientAddr->Address[iPos])));


Can anyone tell me what I'm doing wrong?

int GetRemoteIP(const DWORD dwASessionID, char* pszIPBuff)
{
	int rc = FALSE;
	LPTSTR pszBuffer = NULL;
	DWORD dwBytes = 0;
 
	if (WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, dwASessionID, WTSClientAddress, &pszBuffer, &dwBytes)) {
 
		WTS_CLIENT_ADDRESS* psClientAddr = (WTS_CLIENT_ADDRESS *)pszBuffer;
		if (psClientAddr->AddressFamily == AF_INET) {
 
			/* if the return addr contains a port, ignore the port */
			int iPos = strlen(psClientAddr->Address) == 4 ? 0 : 2;
			char* pszIP = inet_ntoa(*((struct in_addr *)(&psClientAddr->Address[iPos])));
			if (pszIP) {
				strncpy(pszIPBuff, pszIP, MAX_IPADDR_LENGTH);
				pszIPBuff[MAX_IPADDR_LENGTH] = 0;
				rc = TRUE;
			}
		}
		WTSFreeMemory(pszBuffer);
	}
	pszIPBuff[MAX_IPADDR_LENGTH] = '\0';
	return rc;
}

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