WCHAR wStr[128];
char *pch = ptrToMyFuckingkoi8rString;
int pchsize = (int)strlen(pch);
MultiByteToWideChar(0x5182, 0, pch, pchsize+1,  wStr, 128);
WideCharToMultiByte(1251, 0, wStr, 128, pch, pchsize+1, NULL, NULL);