addfont

RemoveFontResource(L"C:\\Windows\\Fonts\\simfang.ttf");
AddFontResource(L"C:\\Windows\\Fonts\\simfang.ttf");

int r = AddFontResource(TEXT("C:\\WINDOWS\\FONTS\\simfang.ttf"));
PostMessage(HWND_BROADCAST, WM_FONTCHANGE, NULL, NULL);
SendMessage(HWND_BROADCAST, WM_FONTCHANGE, NULL, NULL);

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原文：https://www.cnblogs.com/hshy/p/13189559.html