Build with Embarcadero RAD Studio 11.3 Builder C++ error: use of undeclared identifier 'uintptr_t'

C++
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Hello everyone.
I read that the LIB file is not needed to import DLL into x64 applications.
It is enough to convert to the ELF format (file) and add it as a Static Libraries File (.a) to the project.

MKEXP.EXE, the 64-bit Windows Import Library Tool for C++

Has anyone tried to do it this way?
Does anyone have any experience ?

https://docwiki.embarcadero.com/RADStudio/Alexandria/en/MKEXP.EXE,_the_64-bit_Windows_Import_Library_Tool_for_C%2B%2B