RegDBDeleteValue Example

InstallShield 2022 » 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 RegDBDeleteValue function.

*

* RegDBDeleteValue is called to delete the value name "Cursive"

* from the following registry key:

*

* "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Fonts".

*

* Note: Before running this script, set the preprocessor

*       constants so that they reference an existing subkey

*       and value on the target system.

*

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

 

#define SUBKEY "\\Software\\Microsoft\\Windows\\CurrentVersion\\Fonts"

#define VALUE  "Cursive"

#define TITLE  "RegDBDeleteValue Example"

 

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

#include "Ifx.h"

 

export prototype ExFn_RegDBDeleteValue(HWND);

 

function ExFn_RegDBDeleteValue(hMSI)

    STRING szSubKey, szValue, szTitle;

    NUMBER nReturn;

begin

 

    // Set the root key.

    RegDBSetDefaultRoot (HKEY_LOCAL_MACHINE);

    

    // Set the name of the subkey.

    szSubKey = SUBKEY;

    szValue  = VALUE;

    

    // Delete the subkey.

    nReturn = RegDBDeleteValue (szSubKey, szValue);

    

    // Report the results of the deletion.

    if (nReturn < 0) then

        MessageBox ("RegDBDeleteValue failed.", SEVERE);

    else

        SprintfBox (INFORMATION, TITLE, "%s successfully deleted.", szValue);

    endif;

 

end;