https://dl3.downloadly.ir/Files/Software/EhLib.VCL_10.0_Build_10.0.030_for_Delphi_2009-10.4_Downloadly.ir.rar
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The higher the degree, the greater the respect given to the humblest!RAD 11.3
This source already compiled, but It is ok to use EhLibInstaller.exe it'll fail anyways but, will create and copy some components to the "..\Components\EhLib\Lib" folder.
Now manually Open RAD Studio 10.4.x click Menu Components->Install Packages-> Click "Add" button, browse for "..\RADSpecific\Bpl\RADStudioXE10_4" select all *BPLs (ignore some errors).
Now RAD Studio menu Tools->Options->Language->Delphi->Library: Windows 32-bit Library Path and Browsing Path \RADSpecific\RADStudioXE10_4\Win32\Release \Components\EhLib\Lib Windows 64-bit Library Path and Browsing Path \RADSpecific\RADStudioXE10_4\Win64\Release \Components\EhLib\Lib