What is the property in the form that determines whether the control is visible or not

You don't speak any language, it's usually the visible property of each control, that's the visible property of the control.

The visible property (visual foxpro) specifies whether an object is visible or hidden. Read-to-write design and runtime.

lexpr]

Attribute value. lexpr

Specify a value that determines whether a control is visible or hidden. The following table lists the values for lexpr. Lexpr Instructions.

True (..)t.)

The object is visible. (Default value for objects in Form Designer) false (..)f.)

Object hidden. Note: You can still access the control even when it is hidden.

To hide an object at startup, you should set the visible property to false (.) at design timef.)。If you set the visible property in Visible, you can hide an object and then display it at runtime in response to a specific event.

The form control in VFP sets the Visible property is the same as what was said above: visibleIn VFP, set its value to be invisible when setting it to invisible. t.

That's it. That is, right-click on the control to select properties, find visible, and modify it to. t.

That's it. The command can be written as:

Suppose you have a button control command1

Of course, when you want to display it, change its value to: f.

1: 32 bits.

2: Nature. 3: Data.

4: DBF cdx structure composite index file.

5：visible

6: Tuple or Record.

7: PJX8: condition.

9:10: Memory variables, field variables.

11: (Age: 60 or Age<30) and Title="Engineer"

12：.f.

1: 32 bits.

2: Natural connection.

3: Data. 4: dbf cdx structure composite compressed index file 5: visible

6: Tuple or Record.

7: PJX8: condition.

9:10: Memory variables, field variables.

11: (Age: 60 or Age<30) and Title="Engineer"

12：.f. (false)

2 After explaining the array in Visual FoxPro, the default value for each element of the array is F. before it is assigned__

3 The extension of a free table is dbf

The field width of the remarks field and the generic field of the 4 table is a fixed value, and they are both 4

5 If you want to physically delete a record with a delete flag, you can do so using the command pack.

6 The command to select an unused, minimally numbered workspace in Visual FoxPro is sele 0 The keyword must be spelled in its entirety. ）

7 With commands"index on name tag index name"Indexing, whose index type is compound index

8 In Visual FoxPro, one of the functions of indexing is to improve retrieval speed.

9 In Visual FoxPro, referential integrity rules include update rules, insertion rules, and delete rules.

10 The property that determines whether a control is visible in a form is visible

11 The command to modify the record in SQL is the update keyword, which must be spelled completely. ）

12 In Visual FoxPro, to use the sql command to reduce the value of the age field of the student table by 5 years, the command that should be used is update student set age=age-5

is caption, and the text box property used to accept the user's input data is value

The label control displays information and is caption

The caption property of the control refers to the title displayed by the form control, and the name property is the name of the control. For example, for button control, its caption is the word displayed on the button, such as "OK", "login", etc., and its name attribute is the name of the button, such as command1

The caption is the content displayed in the header, and the content of the caption is displayed in the upper left corner of the form when the form runs.

name is the name of the form, which will only be used when other objects refer to the form, and the default one is fine.

The property specifies the title text of the label, which is present in most controls. The title used to indicate the display in the form can be changed in the properties window or by **.

thisform.Label name. caption=string.

I didn't know at first, but if you want to figure it out, you still have to experience it yourself, open VFP, create a new form, change the title of the form, the default caption of the form is form1, and the name of the form is also form1. So some of the beginner values will be confused.

A checkbox can be used""), multiple checkboxes to write loops.

Get all the checkboxes by name, and then make a judgment.