Sets whether the toolbar can be collapsed/expanded (hidden/displayed) or not. By default it is set to 'true' so the toolbar may be collapsed/expanded. By setting to 'false' you will disable this feature. Example:
FCKConfig.ToolbarCanCollapse = false;
If disabled the collapse/expand bar will not be visible in the toolbar.
NOTE: if this option is set to 'false' the function ToolbarStartExpanded doesn't have any effect on the editor.