Button Styles
Specifies a combination of button styles. If you create a button using the BUTTON class with the CreateWindow or CreateWindowEx function, you can specify any of the button styles listed below.
Constants
- BS_3STATE
Creates a button that is the same as a check box, except that the box can be grayed as well as checked or cleared. Use the grayed state to show that the state of the check box is not determined.
BS_AUTO3STATE
Creates a button that is the same as a three-state check box, except that the box changes its state when the user selects it. The state cycles through checked, indeterminate, and cleared.
BS_AUTOCHECKBOX
Creates a button that is the same as a check box, except that the check state automatically toggles between checked and cleared each time the user selects the check box.
BS_AUTORADIOBUTTON
Creates a button that is the same as a radio button, except that when the user selects it, the system automatically sets the button's check state to checked and automatically sets the check state for all other buttons in the same group to cleared.
BS_CHECKBOX
Creates a small, empty check box with text. By default, the text is displayed to the right of the check box. To display the text to the left of the check box, combine this flag with the BS_LEFTTEXT style (or with the equivalent BS_RIGHTBUTTON style).
BS_DEFPUSHBUTTON
Creates a push button that behaves like a BS_PUSHBUTTON style button, but has a distinct appearance. If the button is in a dialog box, the user can select the button by pressing the ENTER key, even when the button does not have the input focus. This style is useful for enabling the user to quickly select the most likely (default) option.
BS_GROUPBOX
Creates a rectangle in which other controls can be grouped. Any text associated with this style is displayed in the rectangle's upper left corner.
BS_LEFTTEXT
Places text on the left side of the radio button or check box when combined with a radio button or check box style. Same as the BS_RIGHTBUTTON style.
BS_OWNERDRAW
Creates an owner-drawn button. The owner window receives a WM_DRAWITEM message when a visual aspect of the button has changed. Do not combine the BS_OWNERDRAW style with any other button styles.
BS_PUSHBUTTON
Creates a push button that posts a WM_COMMAND message to the owner window when the user selects the button.
BS_RADIOBUTTON
Creates a small circle with text. By default, the text is displayed to the right of the circle. To display the text to the left of the circle, combine this flag with the BS_LEFTTEXT style (or with the equivalent BS_RIGHTBUTTON style). Use radio buttons for groups of related, but mutually exclusive choices.
BS_USERBUTTON
Obsolete, but provided for compatibility with 16-bit versions of Windows. Applications should use BS_OWNERDRAW instead.
BS_BITMAP
Specifies that the button displays a bitmap. See the Remarks section for its interaction with BS_ICON.
BS_BOTTOM
Places text at the bottom of the button rectangle.
BS_CENTER
Centers text horizontally in the button rectangle.
BS_ICON
Specifies that the button displays an icon. See the Remarks section for its interaction with BS_BITMAP.
BS_FLAT
Specifies that the button is two-dimensional; it does not use the default shading to create a 3-D image.
BS_LEFT
Left-justifies the text in the button rectangle. However, if the button is a check box or radio button that does not have the BS_RIGHTBUTTON style, the text is left justified on the right side of the check box or radio button.
BS_MULTILINE
Wraps the button text to multiple lines if the text string is too long to fit on a single line in the button rectangle.
BS_NOTIFY
Enables a button to send BN_KILLFOCUS and BN_SETFOCUS notification messages to its parent window.
Note that buttons send the BN_CLICKED notification message regardless of whether it has this style. To get BN_DBLCLK notification messages, the button must have the BS_RADIOBUTTON or BS_OWNERDRAW style.
BS_PUSHLIKE
Makes a button (such as a check box, three-state check box, or radio button) look and act like a push button. The button looks raised when it isn't pushed or checked, and sunken when it is pushed or checked.
BS_RIGHT
Right-justifies text in the button rectangle. However, if the button is a check box or radio button that does not have the BS_RIGHTBUTTON style, the text is right justified on the right side of the check box or radio button.
BS_RIGHTBUTTON
Positions a radio button's circle or a check box's square on the right side of the button rectangle. Same as the BS_LEFTTEXT style.
BS_TEXT
Specifies that the button displays text.
BS_TOP
Places text at the top of the button rectangle.
BS_TYPEMASK
Microsoft Windows 2000: A composite style bit that results from using the OR operator on BS_* style bits. It can be used to mask out valid BS_* bits from a given bitmask. Note that this is out of date and does not correctly include all valid styles. Thus, you should not use this style.
BS_VCENTER
Places text in the middle (vertically) of the button rectangle.
BS_SPLITBUTTON
Microsoft Windows Vista and Version 6.00. Creates a split button. A split button has a drop down arrow.
BS_DEFSPLITBUTTON
Microsoft Windows Vista and Version 6.00. Creates a split button that behaves like a BS_PUSHBUTTON style button, but also has a distinctive appearance. If the split button is in a dialog box, the user can select the split button by pressing the ENTER key, even when the split button does not have the input focus. This style is useful for enabling the user to quickly select the most likely (default) option.
BS_COMMANDLINK
Microsoft Windows Vista and Version 6.00. Creates a command link button.
BS_DEFCOMMANDLINK
Microsoft Windows Vista and Version 6.00. Creates a command link button that behaves like a BS_PUSHBUTTON style button. If the button is in a dialog box, the user can select the command link button by pressing the ENTER key, even when the command link button does not have the input focus. This style is useful for enabling the user to quickly select the most likely (default) option.
Remarks
The appearance of text or an icon or both on a button control depends on the BS_ICON and BS_BITMAP styles, and whether the BM_SETIMAGE message is called. The possible results are as follows.
BS_ICON or BS_BITMAP set? BM_SETIMAGE called? Result
Yes Yes Show icon only.
No Yes Show icon and text.
Yes No Show text only.
No No Show text only