When working in PowerPoint, some regular PowerPoint buttons show "think-cell" in their tooltips.
think-cell needs to hook some PowerPoint functions in order to seamlessly integrate into the regular PowerPoint behavior. For instance, think-cell needs to update its internal information when you hit the Align button on a selection of think-cell objects. Typically, when you press a button that is hooked by think-cell, think-cell does its own maintenance work and then forwards the call to PowerPoint which executes the same function as it normally would.
The tooltip including the hint to the add-in that hooked the button is generated by Microsoft Office. There is no way for an add-in to change or suppress this hint. By way of the tooltip, PowerPoint informs the user that a certain function is being redirected to some add-in, which can be regarded as a security feature helping to avoid accidental execution of malicious software.
If you experience problems with a certain PowerPoint function and you suspect that think-cell may be the culprit because it has hooked that function, you can quickly find out by following the instructions on KB0091: How to find out which add-in causes a problem.