Use these key combinations in the Toolbox:
Enter Place the selected control on the active form.
Down Arrow Select the next tool down.
Up Arrow Select the next tool up.
Left Arrow Select the tool to the left.
Right Arrow Select the tool to the right.
Tab Move down through the Toolbox.
Shift+Tab Move up through the Toolbox.
End Select the last tool in the Toolbox.
Home Select the pointer tool.