CSplitButton::SetDropDownMenu
Sets the drop-down menu that is displayed when a user clicks the drop-down arrow of the current split button control.
void SetDropDownMenu(
UINT nMenuId,
UINT nSubMenuId
);
void SetDropDownMenu(
CMenu* pMenu
);
Parameters
Parameter |
Description |
|---|---|
[in] nMenuId |
The resource ID of the menu bar. |
[in] nSubMenuId |
The resource ID of a submenu. |
[in] pMenu |
Pointer to a CMenu object that specifies a submenu. The CSplitButton object deletes the CMenu object and its associated HMENU when the CSplitButton object goes out of scope. |
Requirements
Header: afxcmn.h
This method is supported in Windows Vista and later.
Additional requirements for this method are described in Build Requirements for Windows Vista Common Controls.
Remarks
The nMenuId parameter identifies a menu bar, which is a horizontal list of menu bar items. The nSubMenuId parameter is a zero-based index number that identifies a submenu, which is the drop-down list of menu items associated with each menu bar item. For example, a typical application has a menu that contains the menu bar items, "File," "Edit," and "Help." The "File" menu bar item has a submenu that contains the menu items, "Open," "Close" and "Exit." When the drop-down arrow of the split-button control is clicked, the control displays the specified submenu, not the menu bar.
The following figure depicts a dialog box that contains a pager control and a (1) split button control. The (2) drop-down arrow has already been clicked and the (3) submenu is displayed.
.png "Dialog with a splitbutton and pager control.")
Example
The first statement in the following code example demonstrates the CSplitButton::SetDropDownMenu method. We created the menu with the Visual Studio resource editor, which automatically named the menu bar ID, IDR_MENU1. The nSubMenuId parameter, which is zero, refers to the only submenu of the menu bar.
// Initialize the dropdown menu of the splitbutton control.
m_splitButton.SetDropDownMenu(IDR_MENU1, 0);
// Create the pager control.
BOOL nRet;
CRect rect;
GetClientRect(&rect);
nRet = m_pager.Create(
(WS_VISIBLE | WS_CHILD | PGS_HORZ),
CRect(rect.Width()/4, 5, (rect.Width() * 3)/4, 55),
this,
IDC_PAGER1);
m_pager.GetClientRect( &rect );
nRet = m_button.Create(
_T("This is a very, very long button. 012345678901234567890"),
(WS_VISIBLE | WS_CHILD), // Do not use CCS_NORESIZE.
CRect(0,0,rect.Width(),30),
&m_pager, IDC_BUTTON1);
m_pager.SetChild(m_button.m_hWnd);
m_pager.SetButtonSize( 20 );
m_pager.SetBorder( 1 );