imgui.cpp compile failure

[PaltryProgrammer]

greetings kind regards
thank you for providing Dear ImGui . compiling imgui.cpp resulted in many undeclared identifier errors being reported . the entire Visual Studio build output is attached . a grep against all Dear ImGui files for the 1st such id est TabBarBorderSize resulted in two instances of its use found in imgui.cpp but none of its declaration .
thank you kindly
Output-Build.txt