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nsisfilepathuninstallation

NSIS Embed Uninstaller readRegStr Filepath

I have an uninstaller created with HM NIS Edit. And as of now it is executing the uninstaller from a static path. But I want to make it dynamic. It has to read the reg and then uses that path as a prefix for to find the uninstaller.

readRegStr $0 HKLM "SOFTWARE\Data Access Worldwide\Visual DataFlex\17.0\Defaults" VDFRootDir

I hope I made myself clear.

Solution

  • You can join strings with StrCpy:

    ReadRegStr $0 HKLM "SOFTWARE\Data Access Worldwide\Visual DataFlex\17.0\Defaults" VDFRootDir
StrCpy $0 "$0\Uninstall Visual DataFlex 17.0.22.0\UNWISE.EXE"
ExecWait '"$0"'

    You don't even need StrCpy if you only use the string once:

    ReadRegStr $0 HKLM "SOFTWARE\Data Access Worldwide\Visual DataFlex\17.0\Defaults" VDFRootDir
ExecWait '"$0\Uninstall Visual DataFlex 17.0.22.0\UNWISE.EXE"'