String Variable Values from RequestDataOnSimObject

[AndyWoz]

[FSX] String Variable Values from RequestDataOnSimObject

Greetings Everyone,

This is my first post here and to say that I am a bit of a newb with SimConnect would be an understatement, so please, bear with me.

I am having difficulty subscribing for string-typed data. Variables returning numeric values I have no problem with, but for whatever reason I can't get anything that's a string.

For example,

SimConnect_AddToDataDefinition(hSimConnect, Ord(DefinitionPdr),
'Vertical Speed', 'Feet per second', SIMCONNECT_DATATYPE_FLOAT32,
0, DATA_VERTICAL_SPEED);

works just fine when I subscribe via SimConnect_RequestDataOnSimObject(). I get events in my dispatch-handler as expected.

But this:

SimConnect_AddToDataDefinition(hSimConnect, Ord(DefinitionPdr),
'TITLE', 'string', SIMCONNECT_DATAType_STRING256,
0, DATA_TITLE);

for whatever reason does not work, meaning I am not receiving DATA_TITLE items; ever. The same applies for just about any other string variable I tried. I am particularly interested in "GPS WP_NEXT ID", for example, but no luck.

BTW, this is Delphi code, if you wondered, but I will gladly accept examples in any un-managed language of your choice, so C or C++ is fine.

I know I am doing something wrong, but what is it? Why am I not getting these string values back?

AW

 

[beatle]

You should pass a null (or 0) instead of 'string' for the UnitsName parameter, see the docs for the AddToDataDef call here: http://msdn.microsoft.com/en-us/library/cc526983.aspx#SimConnect_AddToDataDefinition. Something like this:

SimConnect_AddToDataDefinition(hSimConnect, Ord(DefinitionPdr), 'TITLE', 0, SIMCONNECT_DATATYPE_STRING256, 0, DATA_TITLE);

 

[AndyWoz]

Tim,

Thank you very much! Duh!

Turns out I was trusting the translation of the C headers to Pascal I got off the Web too much - upon closer examination, it defines a wrong signature for the SimConnect_AddToDataDefinition().

Now onto exploring SimConnect some more...

Thanks again,
AW