If you have Delphi 7 Professional or Personal Edition, deactivate theconditional define {$DEFINE DCS} in the RX.INC file before compiling thelibrary.
Use "File\Open..." menu item of Delphi IDE to open RX' runtimepackage RXCTL7.DPK.
In "Package..." window click "Compile" button tocompile packages RXCTL7.DPK.
After compiling repeat that for other RXLibrary run-time packages RXDB7.DPK, RXBDE7.DPK. Put compiled BPL files into directory that is accessible through the search PATH (i.e. DOS"PATH" environment variable; for example, in the Windows\System directory).
After compiling RX run-time packages you must install RX design-timepackages into the IDE.Use "File\Open..." menu item to open RX design-time package DCLRX7.DPK.In "Package..." window click "Compile" button to compile the packageand then click "Install" button to register RX Library components onthe component palette.
Repeat that for other RX Library design-timepackages DCLRXDB7.DPK and DCLRXBD7.DPK.
It informs to the Delphi where this the RXLIB.
Tools>Environment Options>Libray>Library Path
It adds the folder where this the RXLib
$(DELPHI)\Lib\RXLib\Units
if you it copied the RXLIB to \borland\Delphi7\Lib
