facing issue RegDBSetKeyValueEx Creating new key even though the key exists?

[aushami]

Hey guys,
I am new to installshield scripting. I have basic MSI project, where I needed to write custom InstallScript function to update the value of existing key. Now by definition RegDBSetKeyValueEx creates the key if it doesnt find it but in my case the key already exists, so it shouldn't be creating a new key. I have verified it with RegDBKeyExist function. Any idea why it is doing that?

RegDBSetDefaultRoot ( HKEY_CLASSES_ROOT );

        if (RegDBKeyExist(szKey) < 0) then
	    MessageBox ("Key Exists.", INFORMATION);
	endif;
 
    if (RegDBSetKeyValueEx (szKey, "", nType, szNumValue,
                           nSize) < 0) then
        MessageBox ("RegDBSetKeyValueEx failed.", SEVERE);
        abort;
    else
        MessageBox ("RegDBSetKeyValueEx passed.", INFORMATION);
    endif;

[aushami]

Bumping this thread!

[#3]

You are creating a new 'default' key by passing "" as a parameter, but you are only checking for the key root. Would that perhaps be the reason?

[aushami]

Hysteresis wrote:
You are creating a new 'default' key by passing "" as a parameter, but you are only checking for the key root. Would that perhaps be the reason?

Thank you for responding. I am passing "" to set the value of the key for (Default).

[aushami]

Finally fixed it. It was mistake. There was a space at the end of key name, InstallScript doesnt trim tailoring space. Which was causing in creation of new key in the registry.
Thanks!