How to add plugin control's icon?
The documentations seem contradict each other. In PluginPackaging documentation,
Note that the picture filename must match the id number (i.e. the toolbarPICT field of the REALcontrol struct) that you defined for your control.
Where in Plugin SDK documentation,
toolbarPICT: this field is deprecated and should not be used in new plugins. Instead, you should specify the icon in the RBX plugin format manually. This field should be zero. toolbarDownPICT: this field is deprecated and should not be used in new plugins. This field should be zero.
Also, I've tried using filename mentioned in PluginPackaging with no luck.