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The "Requirements" section on many DirectWrite API related webpages (and PDF) indicates that library "Dwrite_1.lib" and DLL "Dwrite_1.dll" must be used for various methods, but those two items DO NOT EXIT!
For samples, see webpage:
https://docs.microsoft.com/en-us/windows/win32/api/dwrite_1/nf-dwrite_1-idwritefont1-getunicoderanges
and PDF at:
https://opdhsblobprod04.blob.core.windows.net/contents/e949ed40438f454fa1a2b24bbb1abfa9/214f63b41c990103f77061f386afc746?sv=2018-03-28&sr=b&si=ReadPolicy&sig=Gf2HxeDvZA2rTivelr6tQJbRydWyNVckYGNiCh93dVw%3D&st=2020-05-28T15%3A49%3A17Z&se=2020-05-29T15%3A59%3A17Z
Seaching through that DirectWrite API PDF documentation shows that the problem is limited to just "Dwrite_1.lib" and "Dwrite_1.dll - i.e., all other documentation refers correctly to "Dwrite.lib" and "Dwrite.dll". And the problem is limited to the sections in the documentation for the Dwrite_1.h header (on the website, this would start with https://docs.microsoft.com/en-us/windows/win32/api/dwrite_1/) (in the PDF, that is the Dwrite_1.h section).
For background, everything in the DirectWrite API appears to be contained in Dwrite.dll which is pointed to by the Dwrite.lib library. In Visual Studio, only Dwrite.lib needs to be added to the Linker>Input>Additional Dependencies area for the project's properties (i.e., the project does NOT need to overtly specify Dwrite.dll).
Request/Solution
Someone should confirm what the required libraries should be (e.g., Dwrite.lib and Dwrite.dll) and then update the affected webpages and PDF sections.