Thanks, it works! I would never thought that this could be called CoolBar.
The name originates from a Windows COM control. VB and Delphi had a wrapper for it. In Delphi VCL the class name is TCoolBar.
LCL also has a TCoolBar but it is a cross-platform custom-drawn component, not a Win API wrapper.
It is used in the IDE, thus name "IDE CoolBar" is logical.
One CoolBar can have many ToolBars.