This will work only with Clarion 6.x, as prior versions of Clarion had no support for XP Themes.
If you don't tick "Force graphics", and don't tick "Force buttons to be NOT-Transparent and NOT-Flat", then when your program is made with Clarion 6.x and you have Default XP manifest activated and you run under Windows XP with themes on and your buttons are transparent and flat, your program will look like this:
Where are the buttons? Well, they are there, but you won't see them until you pass your mouse pointer over them.
You have to tick the "Force buttons to be NOT-Transparent and NOT-Flat" to make them visible, like this:
Then, the same window will look like this:
You can see now all the buttons, with the Windows XP style.
If you want to see your graphics buttons even with Windows XP style activated, first you have to unselect the "Force buttons to be NOT-Transparent and NOT-Flat" checkbox:
Then, you have to tick the "Force graphics" option, and make sure you have your buttons transparent and flat or check also the "Force buttons to be Transparent and Flat" option.
Now, your window will look with the graphic buttons of your choice, even with XP themes, like this:
