While I open exe file in ida I can see lot of calls to
What are those functions ? what they do ?
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These are functions exported by ordinal rather than by name.
This being a C++ library the actual (mangled) function names are long (up to 200 characters with an average of over 50.) Dynamic linking using names in this case would involve lots of long string comparisons that would slow down the loading of applications using this library.
6153 ?GetRecentListOfPanes@CRecentDockSiteInfo@@QEAAAEAV?$CList@PEAUHWND__@@PEAU1@@@H@Z public: class CList<struct HWND__ * __ptr64,struct HWND__ * __ptr64> & __ptr64 __cdecl CRecentDockSiteInfo::GetRecentListOfPanes(int) __ptr64 8718 ?OnCancelMode@CPane@@IEAAXXZ protected: void __cdecl CPane::OnCancelMode(void) __ptr64
You can find lists of these in several reverse engineering tools. e.g. Ghidra