Question about radio button controls

I am working on a kind of multiple choice quiz sheet and have some questions about the usage of controls in Mathcad version 15. 1) When I recalculate the worksheet (via selfmade button control) a new question is selected by random but the radiobuttons have remembered the answer of the preceding question. How can I achieve that all radio buttons are unchecked (as they are when I load the worksheet the first time). 2) How can I install some kind of counter which counts,how many trys were already made? The idea is to have a solution-button which is triggered automatically after, lets say, three attempts (that is three clicks an a different radio button). I think both questions basically have to do with how two different controls can interact with each other.

Controls can only interact with each other via worksheet variables.

The attached file does what you describe above. Apart from one problem, anyway. When you first load the worksheet, if you select a radio button the counter counts more than once. I cannot figure out any way to stop it doing this, and I have spent too much time trying. The problem is not in the script in the counter; the counter is actually being called multiple times, and so logs multiple counts. If you click on the reset button, this behavior goes away, but I have no idea why. The reset button sets a rest flag. When the radio buttons see the reset flag they set their checked state to false, and the output to zero. The trick with the button is that it is written as a function, so it can be called at the end of the sheet to toggle the reset flag back to zero. Note that the Worksheet.recalculate in the button code is necessary. Without it, if the call to the reset function is off the end of the sheet it will not calculate, and the reset flag will not be reset to 0. The counter is based on a function I wrote before that can be used to store data in a worksheet (Saving the state of controls.zip). Since I modified it from that, I don't guarantee the code is optimal for a counter, but it works.

3) I can not use the easier to handle webcontrols, as I need more freedom of placement of the controls. But I like the behaviour of the webcontrols more in some respects. They can be protected and one can still use them if the worksheet ist protected - this is not true for the "regular" controls. You have to unprotect them an so the user is able to show arguments etc. Then I dislike the black border I get around the single radio button when the click it. Is there a way to format the regular radio button controls in a way to behave and look like the webcontrols?

The only properties available are the ones you to via the right click menu. There is no way to change the behavior you describe.

4) How can I change the color of the labels of the radio buttons? Via preferences I can change font, size, italics, bold, etc. but not the color.

You can't.

Hope someone could shed some light on this, as the usage of controls is not that heavy covered in the documentation. Maybe you have a sample worksheet I can learn from or point me to some more extensive documentation.

There are lots of example controls here: Extra Components.mcd I have some others that are not included in that worksheet, so if you want something that's not there. ask.