You have already been given the answer....

Use a TIMage. Make a bitmap for default, disabled and mouse over situation. Assign the correct bitmap to the image. Piece of cake.

I make my main screen in photoshop then cut out a rectangle where the button goes. Apply you mous eover effects and save another rectangle.

That is how I do some of my VCL environments that are not supposed to look like windows environments.

It is a little less flexible than dragging and dropping a tbutton for sure, but you can't have everything.

Experiment...