Join more than 1 lpByte to one

I have a vector<LPBYTE> and want to join all the elements in this vector to only one LPBYTE.
This is what I tried:

LPBYTE lpByte;
for(int i = 0;i<vecLPB.size();++i)
{
	lpByte += vecLPB[i]; //i tried it like this, however this will just give me errors.
}

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How can I manage to do this?