Grid class

"Am I right in assuming that in a "normal" grid, "each control in every column of the grid" refers to the text box controls (but not header controls) in the columns And, if that is correct, the code in question cannot be entered into my base class grid (or base grid class) if I choose, as you suggested, to set the number of columns to -1 "

> No you are not right in your assumption. A column.controls collection has header and other controls in column (typically Controls[1] is the header and Controls[2] is the textbox - unless edited).

> 1) You can decrease columncount to 8,7 ... in code.
>> Okay, but I need it when designing (e.g. in Project manager)

As I told you, you cannot do this - Cetin is, of course, correct that you can change it at run time in code. But at design time you can't.

> 2) You can use SetAll() to assign properties to all member controls of a container type class (like a grid).
>> Okay, but again, I need it as design time (e.g. in Project manager)

And the only way to do that is to use a builder - which is just code that runs at design time. Look at the ASelObj()  function - it will allow you to get a reference to an object at design time and then you can manipulate it in code.

> 3) You can't set when/valid to values like .f./.t. They are not properties but procedures. You can however return values of .f./.t. from their code.
>>1001 Things ... FoxPro, "How do I highlight the current grid row", page 164: "We also need to set the grid's lAbout2LeaveGrid property to true in its Valid method and to false in its When."

 I don't understand why you are quoting our book here (and yes, I am one of the authors of that book!) You have to add code to do that - In the VALID you need "This.lAbout2LeaveGrid = .T." and in the WHEN, you need "This.lAbout2LeaveGrid = .F." and code only executes at RunTime!

> If it's saying "Inherited ..." then that means you didn't write any code ...
>> I re-entered text and everything turned out okay after that.

But that means that you over-wrote anything that was in the SuperClass - you may as well not bother creating the class if you are going to do everything in every instance. (Do you actually understand how inheritance works in VFP )

>> On page 163, it says : "To change the highlight when the current grid row changes, this code is needed in the When method of each control in every column of the grid:  [code]
>>I just assumed that "header" did not apply here (I now know it does not have a When method), but only the text boxes of the grid columns (and, of course, any other control that had been placed into the grid)

Again I am very confused trying to understand what you are thinking. There are two unrelated items here. The column that you see in the Grid - which is what the text you quote refers to, and the Column Object that exists in VFP, which is what Cetin is referring to. The Object has a "controls" collection which defines the class of all obejcts in the column, the Header, the Textbox and any other controls that may have been added. This has nothing to do with the code that you add to any control that you want to display IN the column (which is what the text refers to).

Since you seem to be fond of quoting our book, how about re-reading the paragraph at the bottom of Page 1 where it states:

I suspect that you may have skipped one or more of those volumes....