error C2593: 'operator +=' is ambiguous (watch my code) 1

[d00ape]

How come that this line will compile in VS 6.0 but not in VS 7.0?

strOut += strData[iPos] ^ strKey[iKeyPos++];

strOut, strData and strKey are Cstring.
IPos and iKeyPos is int.

I got the compiler error: C2593: 'operator +=' is ambiguous

Thanks

 

[Cagliostro]

try
strOut += (char)strData[iPos] ^ strKey[iKeyPos++];

Ion Filipski

 

[d00ape]

Really thanks (again) Ion!!