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TBBUTTONINFOW structure (commctrl.h)

  • Article

Contains or receives information for a specific button in a toolbar.

Syntax

typedef struct {
  UINT      cbSize;
  DWORD     dwMask;
  int       idCommand;
  int       iImage;
  BYTE      fsState;
  BYTE      fsStyle;
  WORD      cx;
  DWORD_PTR lParam;
  LPWSTR    pszText;
  int       cchText;
} TBBUTTONINFOW, *LPTBBUTTONINFOW;

Members

cbSize

Type: UINT

Size of the structure, in bytes. This member must be filled in prior to sending the associated message.

dwMask

Type: DWORD

Set of flags that indicate which members contain valid information. This member must be filled in prior to sending the associated message. This can be one or more of the following values.

Value Meaning
TBIF_BYINDEX

Version 5.80. The wParam sent with a TB_GETBUTTONINFO or TB_SETBUTTONINFO message is an index, not an identifier.
TBIF_COMMAND
 The idCommand member contains valid information or is being requested.
TBIF_IMAGE
 The iImage member contains valid information or is being requested.
TBIF_LPARAM
 The lParam member contains valid information or is being requested.
TBIF_SIZE
 The cx member contains valid information or is being requested.
TBIF_STATE
 The fsState member contains valid information or is being requested.
TBIF_STYLE
 The fsStyle member contains valid information or is being requested.
TBIF_TEXT
 The pszText member contains valid information or is being requested.

idCommand

Type: int

Command identifier of the button.

iImage

Type: int

Image index of the button. Set this member to I_IMAGECALLBACK, and the toolbar will send the TBN_GETDISPINFO notification code to retrieve the image index when it is needed.

Version 5.81. Set this member to I_IMAGENONE to indicate that the button does not have an image. The button layout will not include any space for a bitmap, only text.

fsState

Type: BYTE

State flags of the button. This can be one or more of the values listed in Toolbar Button States.

fsStyle

Type: BYTE

Style flags of the button. This can be one or more of the values listed in Toolbar Control and Button Styles.

cx

Type: WORD

Width of the button, in pixels.

lParam

Type: DWORD_PTR

Application-defined value associated with the button.

pszText

Type: LPTSTR

Address of a character buffer that contains or receives the button text.

cchText

Type: int

Size of the buffer at pszText. If the button information is being set, this member is ignored.

Remarks

Note

The commctrl.h header defines TBBUTTONINFO as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header commctrl.h