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Checkbox and RadioButton give the toggle effect. NumericUpDown is a numeric control. What more do you need?

I am not sure about this but I would look at the System.Reflection namespace in the first instance. That is a way to find out what information is contained in classes, and a controls are just a...

Can't say that I have ever heard of this one before. The text entry takes place in the textbox i.e. the key presses are captured by the textbox. So I assume the textbox is also responding to the...

As well as making your data easy to read, you will need to make your questions easier to understand. The Access database format is considered a perfectly acceptable way to display data. Why would you...

Your attached image is not at all helpful. What do you mean by 'add to the total at the end of each column'? You can get the column totals using the SQL SUM() function.

If you obtain the Graphics object from the PaintEventArgs, it use the method MeasureString() to return the size of a string. The method call takes as parameters the text, and the font.

I was wondering which .NET libraries could I use if I need an apliccation to run while windows is using other programs.

All of them! Windows is a multi-tasking operating system.

You don't make...

Because the getpoint method has to wait for the user to pick a point!

Your second version doesn't pick up the files in each directory. Add the following method:

void AddFiles(TreeNode dNode, DirectoryInfo Di)
{
FileInfo[] fis =...

A common feature of cad programs is a getpoint() function. The getpoint() function prompts the user to pick a point which is the return value of the function. I am trying to implement the very same...