wsprintf - find the error :)

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C++

Maybe not enough coffee yet, I don't know. All I'm doing is converting between floating point and a formatted string. Wide char code snippet:

double fVal = 1.234;

wchar_t wbuf[16];
char buf[16];
buf[0] = 0;
int dec, sign;

dec = wsprintf(&wbuf[0], _T("%.3f"), fVal);
dec = sprintf(&buf[0], "%.3f", fVal);

The wsprintf call yields "f" The sprint yields "1.234".

I know I'm being stupid, I just know it. What am I missing?