Overview of forms-Form controls-ActiveX controls Excel 2007
Author: mety Labels:: Overview of forms-Form controls-ActiveX controls Excel 2007
What is a form?A form, whether printed or online, is a document designed with a standard structure and format that makes it easier to capture, organize, and edit information.
You can use Excel in several ways to create printed and online forms. Types of Excel formsThere are several types of forms that you can create in Excel: data forms, worksheets that contain Form and ActiveX controls, and VBA UserForms. You can use each type of form by itself, or you can combine them in different ways to create a solution that's right for you. Data formA data form (data form: A dialog box that displays one complete record at a time. You can use data forms to add, change, locate, and delete records.) provides a convenient way to enter or display one complete row of information in a range or table without scrolling horizontally. You may find that using a data form can make data entry easier than moving from column to column when you have more columns of data than can be viewed on the screen. Use a data form when a simple form of text boxes that list the column headings as labels is sufficient and you don't need sophisticated or custom form features, such as a list box or spin button.
Excel can automatically generate a built-in data form for your range (range: Two or more cells on a sheet. The cells in a range can be adjacent or nonadjacent.) or table (table: A collection of data about a particular subject that is stored in records (rows) and fields (columns).). The data form displays all column headers as labels in a single dialog box. Each label has an adjacent blank text box in which you can enter data for each column, up to a maximum of 32 columns. In a data form, you can enter new rows, find rows by navigating, or (based on cell contents) update rows and delete rows . If a cell contains a formula (formula: A sequence of values, cell references, names, functions, or operators in a cell that together produce a new value. A formula always begins with an equal sign (=).), the formula result is displayed in the data form, but you cannot change the formula by using the data form. Worksheet with Form and ActiveX controlsA worksheet is a type of form that enables you to enter and view data on the grid, and there are several control-like features already built-in to Excel worksheets, such as comments and data validation. Cells resemble text boxes in that you can enter and format them in a variety of ways. Cells are often used as labels, and by adjusting cell height and width and merging cells, you can make a worksheet behave like a simple data entry form. Other control-like features, such as cell comments, hyperlinks, background images, data validation, conditional formatting, embedded charts, and AutoFilter can make a worksheet behave like an advanced form. For added flexibility, you can add controls and other drawing objects to the drawing canvas (drawing canvas: An area on which you can draw multiple shapes. Because the shapes are contained within the drawing canvas, they can be moved and resized as a unit.) of a worksheet, and combine and coordinate them with worksheet cells. For example, you can use a list box control to make it easier for a user to select from a list of items. Or, you can use a spin button control to make it easier for a user to enter a number. Because controls and objects are stored on the drawing canvas, you can display or view controls and objects alongside associated text that is independent of row and column boundaries without changing the layout of a grid or table of data on your worksheet. Most of the time, many of these controls can also be linked to cells on the worksheet and do not require VBA code to make them work. You can set properties that determine whether a control floats freely or moves and resizes together with a cell. For example, you might have a check box that you want to move together with its underlying cell when the range is sorted. However, if you have a list box that you want to keep in a specific location at all times, you probably do not want it to move together with its underlying cell. Excel has two types of controls: Form controls and ActiveX Controls. In addition to these sets of controls, you can also add objects from the Drawing tools, such as a AutoShapes (AutoShapes: A group of ready-made shapes that includes basic shapes, such as rectangles and circles, plus a variety of lines and connectors, block arrows, flowchart symbols, stars and banners, and callouts.), WordArt (WordArt: Text objects you create with ready-made effects to which you can apply additional formatting options.), SmartArt graphic, or text boxes. The following sections describe these controls and drawing objects, and also explain how to work with these controls and objects in more detail.
Form controlsForm controls are the original controls that are compatible with earlier versions of Excel, starting with Excel version 5.0. Form controls are also designed for use on XLM macro sheets. You use Form controls when you want to easily reference and interact with cell data without using VBA code, and when you want to add controls to chart sheets (chart sheet: A sheet in a workbook that contains only a chart. A chart sheet is beneficial when you want to view a chart or a PivotChart report separately from worksheet data or a PivotTable report.). For example, after you add a list box control to a worksheet and linking it to a cell, you can return a numeric value for the current position of the selected item in the control. You can then use that numeric value in conjunction with the INDEX function to select different items from the list. You can also run macros by using Form controls. You can attach an existing macro to a control, or write or record a new macro. When a user of the form clicks the control, the control runs the macro. However, these controls cannot be added to UserForms, used to control events, or modified to run Web scripts on Web pages. Summary of form controls
Note The following controls are unavailable in Office Excel 2007 workbooks. These controls can be used in Excel version 5.0 dialog sheets only.
ActiveX controlsActiveX controls (ActiveX control: A control, such as a check box or button that offers options to users or runs macros or scripts that automate a task. You can write macros for the control in Microsoft Visual Basic for Applications or scripts in Microsoft Script Editor.) can be used on worksheet forms, with or without the use of VBA code, and on VBA UserForms. In general, use ActiveX controls when you need more flexible design requirements than those provided by Form controls. ActiveX controls have extensive properties that you can use to customize their appearance, behavior, fonts, and other characteristics. You can also control different events that occur when an ActiveX control is interacted with. For example, you can perform different actions, depending on which choice a user selects from a list box control, or you can query a database to refill a combo box with items when a user clicks a button. You can also write macros that respond to events associated with ActiveX controls. When a user of the form interacts with the control, your VBA code then runs to process any events that occur for that control. Your computer also contains many ActiveX controls that were installed by Excel and other programs, such as Calendar Control 12.0 and Windows Media Player. Important Not all ActiveX controls can be used directly on worksheets; some can be used only on Visual Basic for Applications (VBA) (Visual Basic for Applications (VBA): A macro-language version of Microsoft Visual Basic that is used to program Microsoft Windows-based applications and is included with several Microsoft programs.) UserForms. If you try to add any one of these particular ActiveX controls to a worksheet, Excel displays the message "Cannot insert object." However, ActiveX controls cannot be added to chart sheets from the user interface or to XLM macro sheets. You also cannot assign a macro to run directly from an ActiveX control the same way you can from a Form control. Summary of ActiveX controls
Drawing Tool objects
You may also want to include SmartArt graphics, Shapes, WordArt, and text boxes on your form. You can resize, rotate, flip, color, and combine these objects to create even more complex shapes. When you type text directly in a Shape or text box object, the text becomes part of that object — if you rotate or flip the object, the text rotates or flips with it. Unlike ActiveX controls, you can assign different attributes, such as font size and font style, to individual words and characters in the object. You can also assign macros and add hyperlinks to these objects. You can even link text in a Shape or text box object to a worksheet cell and dynamically display updated values in those objects. Working with controls and objects on the worksheet formAfter adding forms and ActiveX to a worksheet form, you usually want to fine-tune and rearrange the controls in a variety of ways to create a well-designed, user friendly form. Common tasks include the following:
You can design a worksheet form with or without cell gridlines in the background. For example, you might want to turn off cell gridlines and then format all the cells with the same color or pattern, or even use a picture as a sheet background. To hide or show the gridlines, on the View tab, in the Show/Hide group, clear or select the Gridlines check box. For more information, see the See Also section of this topic.
Determining the type of control that is on your worksheetBecause there are three different types of controls and objects that you can modify uniquely, you might not know for sure which type of control it is just by looking at it. To determine the type of control (Form or ActiveX), select and right-click the control, and then display the shortcut menu:
VBA UserFormsFor maximum flexibility, you can create UserForms, which are custom dialog boxes, that usually include one or more ActiveX controls. You make UserForms available from VBA code that you create in the Visual Basic Editor (Microsoft Visual Basic Editor: An environment in which you can edit macros that you've recorded and write new macros and Visual Basic for Applications programs.). The high-level steps for creating a UserForm are as follows:
By using UserForms, you can also utilize advanced form functionality,. For example, you can programmatically add a separate option button for each letter of the alphabet or you can add a check box for each item in a large list of dates and numbers. Before creating a UserForm, consider using built-in dialog boxes available from Excel that might fit your needs. These built-in dialog boxes include the VBA InputBox and MsgBox functions, the Excel InputBox method, GetOpenFilename method, GetSaveAsFilename method, and the Dialogs object of the Application object, which contains all the built-in Excel dialog boxes.
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