WIX:default directory in WixUI_InstallDir

Question

The default directory in WixUI_InstallDir is always D:. How do i change it to directory C:?

It is also not showing my directory structure defined in .wxs file.It is

Answer 1

By default, TARGETDIR (and ROOTDRIVE but nobody uses that) default to the largest drive on the machine. See ligget78's answer to address that.

Answer 2

You can use the following property in the Product definition:

    <Property Id="WIXUI_INSTALLDIR" Value="INSTALLDIR"/>

INSTALLDIR can be defined like

<Directory Id="ProgramFilesFolder">
    <Directory Id="MySoftware" Name="MySoftware">
      <Directory Id="INSTALLDIR" Name="MyProduct">
      </Directory>
    </Directory>
</Directory>