How to retain service settings through InstallShield upgrade install

Question

I have an InstallScript project in IS2010. It has a handful of services that get installed. Some are C++ exes and use the \"InstallShield Object for NT Services\". Others

Answer 1

I got this working by reading the service information from the registry in OnUpdateUIBefore, storing it in a global variable, and writing the information back to the registry in OnUpdateUIAfter.

Code:

export prototype void LoadServiceSettings();
function void LoadServiceSettings()
number i, nResult;
string sServiceNameArray(11), sRegKey, sTemp;
BOOL bEntryFound;
begin
PopulateServiceNameList(sServiceNameArray);
RegDBSetDefaultRoot(HKEY_LOCAL_MACHINE);
//write service start values to the registry
for i = 0 to 10
    if (ServiceExistsService(sServiceNameArray(i))) then
        sRegKey = "SYSTEM\\CurrentControlSet\\Services\\" + sServiceNameArray(i);
        nResult = RegDBSetKeyValueEx(sRegKey, "Start", REGDB_NUMBER, sServiceSettings(i), -1);
        if(nResult < 0) then
            MessageBox ("Unable to save service settings: " + sServiceNameArray(i) + ".", SEVERE);
        endif;
    endif;
endfor;
RegDBSetDefaultRoot(HKEY_CLASSES_ROOT); //set back to default
end;

export prototype void SaveServiceSettings();
function void SaveServiceSettings()
number i, nType, nSize, nResult;
string sServiceNameArray(11), sRegKey, sKeyValue;
begin
PopulateServiceNameList(sServiceNameArray);
RegDBSetDefaultRoot(HKEY_LOCAL_MACHINE);
for i = 0 to 10
    if (ServiceExistsService(sServiceNameArray(i))) then
        //get service start values from registry
        sRegKey = "SYSTEM\\CurrentControlSet\\Services\\" + sServiceNameArray(i);
        nResult = RegDBGetKeyValueEx(sRegKey, "Start", nType, sKeyValue, nSize);
        if(nResult < 0) then
            MessageBox ("Unable to save service settings: " + sServiceNameArray(i) + ".", SEVERE);
        endif;
        sServiceSettings(i) = sKeyValue;
    endif;
endfor;
RegDBSetDefaultRoot(HKEY_CLASSES_ROOT); //set back to default
end;