Differences between Microsoft RegSetValue and NI RegWriteString

[Paul_Knight_Lockheed_Mart]

I am trying to write the registry using the function RegWriteString as follows

iLocalFail = RegWriteString(REGKEY_HKCU, "Software\\Custom PDF Printer\\OutputFile", "OutputFile", caFilenameWithPathInfo);  I get a Default and OutputFile under the Custom PDF Printer\Outputfile key, see attachment NI Write.jpg.

When I use the Microsoft RegCreateKeyEx and RegSetValue functions

lReturnValue = RegCreateKeyEx(HKEY_CURRENT_USER, "Software\\Custom PDF Printer", 0, NULL , REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, 0, &hKeyHandle, &ulReturnValue);

lReturnValue = RegSetValue(hKeyHandle, "OutputFile", REG_SZ, caFilenameWithPathInfo, strlen(caFilenameWithPathInfo));

I only get the Default value set to the filename, see attachment Microsoft Write.jpg.

The program that I am setting the registry for wants the Microsoft results.  The NI functions make the program cleaner, but why are the results different.

[nickb · Accepted solution]

Hey Paul - 

To get what you're looking for, you just need to pass NULL to the "ValueName" parameter:

NickB

National Instruments 

[Paul_Knight_Lockheed_Mart]

Thanks, that works