VarSave Example

InstallShield 2016 » InstallScript Language Reference

Note • To call this function in a Basic MSI setup, you must first create a custom action for the entry-point function, execute the custom action in a sequence or as the result of a dialog's control event, and then build the release.

/*--------------------------------------------------------------*\

*

* InstallShield Example Script

*

* Demonstrates the VarSave and VarRestore functions.

*

* This script starts by displaying the starting values of the

* system variables SRCDIR and INSTALLDIR.  It then calls VarSave

* to save those values.  Next, it assigns new values to SRCDIR

* and INSTALLDIR, and it displays those values.  Finally, it

* calls VarRestore to restore the original values, which are

* then displayed.

*

\*--------------------------------------------------------------*/

#define  NEW_SOURCE_DIR "C:\\Source"

#define  NEW_INSTALL_DIR "C:\\Target"

// Include Ifx.h for built-in InstallScript function prototypes.

#include "Ifx.h"

export prototype ExFn_VarSave(HWND);

function ExFn_VarSave(hMSI)

begin

    // Display the values of SRCDIR and INSTALLDIR.

    SprintfBox (INFORMATION, "Starting Source and Target Folders",

               "Source:\n\n%s\n\n Target:\n\n%s ",

               SRCDIR, INSTALLDIR);

    // Save the current values of SRCDIR and INSTALLDIR.

    VarSave (SRCTARGETDIR);

    // Assign new values to SRCDIR and INSTALLDIR.

    SRCDIR    = NEW_SOURCE_DIR;

    INSTALLDIR = NEW_INSTALL_DIR;

    // Display the values of SRCDIR and INSTALLDIR.

    SprintfBox (INFORMATION, "New Source and Target Folders",

               "New Source:\n\n%s\n\n New Target:\n\n%s",

               SRCDIR, INSTALLDIR);

    // Restore the old values.

    VarRestore (SRCTARGETDIR);

    // Display the values of SRCDIR and INSTALLDIR.

    SprintfBox (INFORMATION, "Restored Source and Target Folders",

               "Source:\n\n%s\n\n Target:\n\n%s ",

               SRCDIR, INSTALLDIR);

end;

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