They are spaced widely, and have an odd bevel encompassing them. Here's a good example of a MS style toolbar. The buttons have no spaces except for separators, use standard format and pictures, and are small and easy to see. Use Windows 95 Common Controls Windows 95 programs should use Windows 95 controls. You need help for toolbars.
Many programs offer absolutely none.
Here's Word with way too many toolbars open. This status bar gives important information at a glance. Make yours like that too. Have Efficient Menus Don't use convoluted menus of sub-menus of menus. Use a dialog box for information.