Table 1-4 lists the messages sent to toolbars and the member functions MFC provides for the CToolBarCtrl class. For details about each message, its parameters, and possible return values, refer to the Win32 SDK documentation.
| Message | Member Function | Description |
| TB_ADDBITMAP | AddBitmap | Adds a new bitmap to the list of bitmaps available for a toolbar. |
| TB_ADDBUTTONS | AddButtons | Adds one or more buttons to a toolbar. |
| TB_ADDSTRING | AddString | Adds a new string to the list of strings available for a toolbar. |
| TB_AUTOSIZE | AutoSize | Forces a toolbar to be resized. An application sends this message when it changes a toolbar's size (for example, by setting the button size or adding strings). |
| TB_BUTTONCOUNT | ButtonCount | Retrieves a count of the buttons currently on a toolbar. |
| TB_BUTTONSTRUCTSIZE | SetButtonStructSize | Specifies the TBBUTTON structure's size, which Windows uses to determine which version of COMMCTRL.DLL is in use. If an application uses CreateWindow to create the toolbar, it must send this message before adding any buttons. The CreateToolbarEx function automatically sends this message, and the size of the TBBUTTON structure is a parameter to CreateToolbarEx. |
Table 1-4. (continued)
Toolbar messages and member functions.
| Message | Member Function | Description |
| TB_CHANGEBITMAP | Changes the bitmap for a button. | |
| TB_CHECKBUTTON | CheckButton | Checks or unchecks a given button. (When a button is checked, it appears “pressed.”) |
| TB_COMMANDTOINDEX | CommandToIndex | Retrieves the zero-based index for the button associated with the specified command identifier. |
| TB_CUSTOMIZE | Customize | Displays the Customize Toolbar dialog box. |
| TB_DELETEBUTTON | DeleteButton | Deletes a button from a toolbar. |
| TB_ENABLEBUTTON | EnableButton | Enables or disables the specified button. When a button has been enabled, it can be checked (“pressed”). |
| TB_GETBITMAP | Retrieves the index of the bitmap associated with a toolbar button. | |
| GetBitmapFlags | Returns TBBF_LARGE if the display can support large toolbar bitmaps. | |
| TB_GETBUTTON | GetButton | Retrieves information about the given button. |
| TB_GETBUTTONTEXT | Retrieves the text of a button. | |
| TB_GETITEMRECT | GetItemRect | Retrieves the bounding rectangle of a button on a toolbar (unless the button's state is set to TBSTATE_HIDDEN). |
| TB_GETROWS | GetRows | Retrieves the number of rows of toolbar buttons. |
| TB_GETSTATE | GetState | Retrieves information about the state of a button, such as whether it is enabled or checked. |
| TB_GETTOOLTIPS | GetToolTips | Retrieves the handle to a ToolTip control associated with a toolbar. |
| TB_HIDEBUTTON | HideButton | Hides or shows a specified button. |
| TB_INDETERMINATE | Indeterminate | Sets or clears the indeterminate state of the specified button. |
| TB_INSERTBUTTON | InsertButton | Inserts a button in the specified location on a toolbar. |
| TB_ISBUTTONCHECKED | IsButtonChecked | Determines whether the given button is checked. |
| TB_ISBUTTONENABLED | IsButtonEnabled | Determines whether the given button is enabled. |
| TB_ISBUTTONHIDDEN | IsButtonHidden | Determines whether the given button is hidden. |
| TB_ISBUTTON- INDETERMINATE | IsButton- Indeterminate | Determines whether the given button is indeterminate. |
| TB_ISBUTTONPRESSED | IsButtonPressed | Determines whether the given button is “pressed.” |
| TB_PRESSBUTTON | PressButton | “Presses” or “releases” the given button. |
| TB_SAVERESTORE | SaveState or | Saves or restores the state of a RestoreStatetoolbar. |
| TB_SETBITMAPSIZE | SetBitmapSize | Sets the size of the bitmapped images to be added to a toolbar. The size can be set only before you add any bitmaps to the toolbar. If an application does not explicitly set the bitmap size, the size defaults to 16-by-16 pixels. |
| TB_SETBUTTONSIZE | SetButtonSize | Sets the size of the buttons to be added to a toolbar. You can set the button size only before you add any buttons to the toolbar. If an application does not explicitly set the button size, the size defaults to 24-by-22 pixels. |
| TB_SETCMDID | SetCmdID | Sets the command ID of a button. |
| SetOwner | Sets the owner window of a toolbar. | |
| TB_SETPARENT | Sets the parent window of a toolbar. | |
| TB_SETROWS | SetRows | Sets the number of rows of buttons in a toolbar. |
| TB_SETSTATE | SetState | Sets the state for the given button. |
| TB_SETTOOLTIPS | SetToolTips | Sets the handle to a ToolTip control associated with a toolbar. |