Hi Tomasz,

I notice you use InterfaceID.Keycontrol, which is incorrect. In the SDK docs I_KEYCONTROL is 0x00001060, while InterfaceID.Keycontrol = 0x00001100. So try:

var keys = (IIKeyControl)icontrol.PositionController.GetInterface(0x00001100);

instead and see if that works.

Hi Tomasz,

Yes that is strange indeed (that it'd return null). Perhaps the upcasting code is using the wrong interface ID, I will check that. Meanwhile you can use MaxScript functions to access keys. I had to tackle the same problem in ZK and ended up using maxscript for most of the key handling.

For example, to get number of keys I use:

int keyCount = MaxScript.ExecuteWithReference( "numKeys {reference}", control ).ToInt;

You do need to make sure that {reference} is replaced with your control (you need to be able to get to the control either through the node or object you're editing).

Other examples, to get key time:

int currentKeyTime = MaxScript.ExecuteWithReference( "( getKeyTime {reference} " + ( i + 1 ) + " ) as integer", control ).ToInt;

to delete keys:

MaxScript.ExecuteWithReference( "deleteKeys {reference}", control );

etc. Hope this helps.

Thanks Tomasz,

I guess this requires more tweaking.