Guys, try this

In VFP5.0 make a new form with three text boxes in it.
Set the value of the first textbox to ="A", Format to K.
Set the value of the second textbox to 9, Format to K, Input Mask to 99999
Set the value of the third textbox to 9, Format to K, Input mask to 9

Now tab between them.
Now double click at each end, and in the middle.

Do you get unpredictable 'Select all' results?

I just want to be able to click on a textbox, have all the text or numerical values selected. Can't seem to get it done