ImmGetConversionList always return 0 on win10 + vs2017

[HanLCSS]

I have a program build with vs2003 for winXP, then I want to upgrade it to vs2017 and run on win10
when I debug result value on ImmGetConversionList, it always return 0

hIMC = ImmGetContext(m_hWnd);

hKL = GetKeyboardLayout(0);

sprintf(szKanji,"%s", kanji);

dwSize = ImmGetConversionList(hKL, hIMC, szKanji, NULL, 0, GCL_REVERSECONVERSION);

so, function ImmGetConversionList still work on win10 or vs2017, or I wrong somewhere @@

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