How to change the font? i try many ways but not work

[L1mit1337]

i use these code:
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.Fonts->AddFontFromFileTTF("c:\Windows\Fonts\msyh.ttc", 16.0f, NULL, io.Fonts->GetGlyphRangesChineseFull());

not work!!!