我几乎是 MFC 的新手。我只是将一个新的拆分按钮控件从工具箱拖放到对话框中。然后我更改了按钮的标题。（更喜欢附加的img）我尝试运行该应用程序。新按钮消失。当我将鼠标移到按钮位置并单击鼠标左键时。显示了一个看起来像复选框的小矩形。
属性参数设置出了什么问题？我可以错过什么吗？为什么没有显示新的拆分按钮？
此外， OnBnClickedSplit1() 尚未实现。另一个按钮仍然正常显示。
// MFCApplication5Dlg.cpp : implementation file
//
#include "stdafx.h"
#include "MFCApplication5.h"
#include "MFCApplication5Dlg.h"
#include "afxdialogex.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// CMFCApplication5Dlg dialog
CMFCApplication5Dlg::CMFCApplication5Dlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CMFCApplication5Dlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMFCApplication5Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CMFCApplication5Dlg, CDialogEx)
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDOK, &CMFCApplication5Dlg::OnBnClickedOk)
ON_EN_CHANGE(IDC_EDIT1, &CMFCApplication5Dlg::OnEnChangeEdit1)
ON_BN_CLICKED(IDC_SPLIT1, &CMFCApplication5Dlg::OnBnClickedSplit1)
ON_NOTIFY(BCN_DROPDOWN, IDC_SPLIT1, &CMFCApplication5Dlg::OnBnDropDownSplit1)
END_MESSAGE_MAP()
// CMFCApplication5Dlg message handlers
BOOL CMFCApplication5Dlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
return TRUE; // return TRUE unless you set the focus to a control
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CMFCApplication5Dlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialogEx::OnPaint();
}
}
// The system calls this function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CMFCApplication5Dlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}
void CMFCApplication5Dlg::OnBnClickedOk()
{
CString StrTmp;
// TODO: Add your control notification handler code here
}
void CMFCApplication5Dlg::OnEnChangeEdit1()
{
// TODO: If this is a RICHEDIT control, the control will not
// send this notification unless you override the CDialogEx::OnInitDialog()
// function and call CRichEditCtrl().SetEventMask()
// with the ENM_CHANGE flag ORed into the mask.
// TODO: Add your control notification handler code here
}
void CMFCApplication5Dlg::OnBnClickedSplit1()
{
// TODO: Add your control notification handler code here
}
void CMFCApplication5Dlg::OnBnDropDownSplit1(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMBCDROPDOWN pDropDown = reinterpret_cast<LPNMBCDROPDOWN>(pNMHDR);
*pResult = 0;
*pResult = 0;
}