自绘菜单

原理：
重载CDialog的以下三个消息
WM_DRAWITEM：绘制菜单的样式
WM_MEASUREITEM：指定要绘制菜单的大小
WM_INITMENU：把框架菜单全部改成带MF_OWNERDRAW标志

相关代码:

void CTestRgnDlg::OnInitMenu(CMenu* pMenu)
{
    //CDialog::OnInitMenu(pMenu);

    CMenu *pSubMenu;
    UINT nCount,nSubCount,nID;
    CString strText;
    nCount = pMenu->GetMenuItemCount();

    for(UINT i=0;i<nCount;i++)
    {
        pSubMenu =pMenu->GetSubMenu(i);
        nSubCount=pSubMenu->GetMenuItemCount();
        for(UINT j=0;j<nSubCount;j++)
        {
            nID=pSubMenu->GetMenuItemID(j);
            // 将框架菜单所有菜单都添加MF_OWNERDRAW标志
            pSubMenu->ModifyMenu(j,MF_BYPOSITION|MF_OWNERDRAW,nID);
            pSubMenu->GetMenuString(j,strText,MF_BYPOSITION);
        }
    }
}

void CTestRgnDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
    LPDRAWITEMSTRUCT& lpD=lpDrawItemStruct; //起个别名,好用一点

    //判断是不是菜单自绘,因为按钮也可以自绘
    if(nIDCtl==0)
    {
        CDC* pDC=CDC::FromHandle(lpD->hDC); //得到菜单的设备指针,用来绘制菜单
        pDC->SetBkMode(TRANSPARENT);

        CMenu menu;
        menu.Attach((HMENU)lpD->hwndItem); //得到框架菜单对象
        CRect AllRgn(lpD->rcItem);   //得到当前绘制的菜单选项项大小
        CRect FrontRgn(AllRgn.left,AllRgn.top,20,AllRgn.bottom);
        CBrush brushAll(RGB( 250,250,250 )); //初始化画刷
        CBrush brushFront(RGB( 230,230,230 ));
        CBrush brushSel(RGB(148,170,214 ));
        CString strText;
        menu.GetMenuString(lpD->itemID,strText,MF_BYCOMMAND);//得到当前绘制的菜单选项文本

        if(lpD->itemID!=ID_SEPARATOR) //菜单和分隔栏分别绘制
        {
            if(lpD->itemAction & ODA_SELECT) //菜单选中时的样式
            {
                pDC->FillRect(AllRgn,&brushSel);//绘制
                if(lpD->itemState &ODS_GRAYED)
                {
                    //设定文本颜色(在最后才绘制出来)
                    pDC->SetTextColor(RGB(194,194,194));
                }
                else if(lpD->itemState & ODS_SELECTED)
                {
                    pDC->SetTextColor(RGB(250,250,250));
                }
            }

            //菜单非选中时的样式
            if(!((lpD->itemAction & ODA_SELECT) && (lpD->itemState & ODS_SELECTED)))
            {
                pDC->FillRect(AllRgn,&brushAll);//绘制
                pDC->FillRect(FrontRgn,&brushFront);
                if(lpD->itemState & ODS_GRAYED)
                {
                    pDC->SetTextColor(RGB(194,194,194 ));
                }
                else
                {
                    pDC->SetTextColor(RGB(66,110,180 ));
                }
            }
        }
        else
        {
            pDC->FillRect(AllRgn,&brushFront);//绘制分隔栏
        }
        pDC->TextOut(AllRgn.left+30,AllRgn.top+5,strText);//打印出字体
        menu.Detach();//分隔菜单句柄和对象(必要!)
    }
}

void CTestRgnDlg::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    LPMEASUREITEMSTRUCT& lpM=lpMeasureItemStruct; //起个别名,好用一点

    if(lpM->CtlType==ODT_MENU)
    { //判断是不是菜单要自绘
        if(lpM->itemID!=ID_SEPARATOR)//分别设定普通菜单和分隔栏的大小　　
        {
            lpM->itemHeight=20;//普通菜单大小　
            lpM->itemWidth=150;
        }
        else
        {
            lpM->itemHeight=1;//分隔栏大小
            lpM->itemWidth=150;
        }
    }
}

 

相关参考：
http://read.pudn.com/downloads123/sourcecode/windows/control/menu/521893/MyOwnButton/%E8%87%AA%E7%BB%98%E6%8C%89%E9%92%AEDlg.cpp__.htm
http://blog.csdn.net/Blue_Dream_/archive/2009/02/03/3860881.aspx