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ListBox Control

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The ListBox control is a regular list box that enables the user to make a single selection from a list of predetermined values. The possible values are read from the Listbox table. You can associate a string or integer property by entering the property's name in the Property column of the Control table.

Control Attributes

You can use the following attributes with this control. To change the value of an attribute using an event, subscribe the control to a ControlEvent in the EventMapping table and list the attribute's identifier in the Attribute column. Enter the identifier of the ControlEvent in the Event column.

Attribute identifier Hexadecimal bit Description
IndirectPropertyName This is the name of an indirect property associated with the control. If the Indirect attribute bit is set, the control displays or changes the value of the property having this name. If the Indirect attribute bit is set, this name is also the value of the property listed in the Property column of the Control table.
Position Position of the control in the dialog box. Enter the control's width, height, and coordinates of the control's left corner into the Width, Height, X, and Y columns of the Control table. Use installer units for length and distance.
PropertyName This is the name of the property associated with this control. If the Indirect attribute bit is not set, the control displays or changes the value of the property having this name. This attribute is specified in the Property column of the Control table.
PropertyValue Current value of the property displayed or changed by this control. If the Indirect attribute bit is not set, this is the value of PropertyName. If the Indirect attribute bit is set, this is the value of IndirectPropertyName. If the attribute changes, the control reflects the new value.
Text Text displayed by screen readers. Enter the text to be displayed into the Text column of the Control table. To set the font and font style of a text string, prefix the string of displayed characters with {\style} or {&style}. Where style is an identifier listed in the TextStyle column of the TextStyle table. If neither of these are present, but the DefaultUIFont property is defined as a valid text style, that font will be used.
Visible 0x00000000 0x00000001
 Hidden control. Visible control.
Include this bit in the bit word of the Attributes column in the Control table to make the control visible or hidden upon its creation.
You can also hide or show a control by using the ControlCondition table.
Enabled 0x00000000 0x00000002
 Control in a disabled state. Control in an enabled state.
Include this bit in the bit word in the Attributes column of the Control to enable the control on creation.
You can also enable or disable a control by using the ControlCondition table.
Sunken 0x00000000 0x00000004
 Displays the default visual style. Displays the control with a sunken, 3-D, look.
Include these bits in the bit word in the Attributes column of the Control table.
Indirect 0x00000000 0x00000008
 The control displays or changes the value of the property in the Property column of the Control table. The control displays or changes the value of the property that has the identifier listed in the Property column of the Control table.
Determines if the property associated with this control is referenced indirectly.
Integer 0x00000000 0x00000010
 Property associated with the control is a string value. Property associated with the control is an integer value.
Include this bit in the bit word of the Attributes column of the Control table to set this attribute on creation of the control.
RTLRO 0x00000000 0x00000020
 Text in the control is displayed in left-to-right reading order. Text in the control is displayed in right-to-left reading order.
RightAligned 0x00000000 0x00000040
 Text in the control is aligned to the left. Text in the control is aligned to the right.
LeftScroll 0x00000000 0x00000080
 The scroll bar is located on the right side of the control. The scroll bar is located on the left side of the control.
BiDi 0x000000E0 Set this value for a combination of the RTLRO, RightAligned, and LeftScroll attributes.
Sorted 0x00000000 0x00010000
 Items displayed in alphabetical order. Items displayed in order specified in the ListView table.
Include this bit in the bit word in the Attributes column to display items in the order specified by the Order column of the ListView table.
UsersLanguage 0x00000000 0x00100000
 Fonts created in the database code page. Fonts created in the user's default UI code page.

 

Remarks

This control can be created from the LISTBOX class by using the CreateWindowEx function. It has the WS_TABSTOP, WS_GROUP, and WS_CHILD styles. If the Sorted control style bit is on, the control is created with the LBS_NOTIFY, WS_VSCROLL, and WS_BORDER styles, otherwise, the control is created with the LBS_STANDARD style.