正在阅读：VC中的常用的20个方法VC中的常用的20个方法

2005-02-22 10:17 出处：作者：oury 责任编辑：xietaoming

九、显示和隐藏程序菜单

CWnd *pWnd=AfxGetMainWnd();
if(b_m) //隐藏菜单
{
    pWnd->SetMenu(NULL);
    pWnd->DrawMenuBar();
    b_m=false;
}
else
{
    CMenu menu;
    menu.LoadMenu(IDR_MAINFRAME); ////显示菜单也可改变菜单项
    pWnd->SetMenu(&menu);
    pWnd->DrawMenuBar();
    b_m=true;
    menu.Detach();
}

十、获取可执行文件的图标

HICON hIcon=::ExtractIcon(AfxGetInstanceHandle(),_T("NotePad.exe"),0);
if (hIcon &&hIcon!=(HICON)-1)
{
pDC->DrawIcon(10,10,hIcon);

}
DestroyIcon(hIcon);

十一、窗口自动靠边程序演示

BOOL AdjustPos(CRect* lpRect)
{//自动靠边
    int iSX=GetSystemMetrics(SM_CXFULLSCREEN);
    int iSY=GetSystemMetrics(SM_CYFULLSCREEN);
    RECT rWorkArea;
    BOOL bResult = SystemParametersInfo(SPI_GETWORKAREA, sizeof(RECT), &rWorkAre
        a, 0);
    CRect rcWA;
    if(!bResult)
    {//如果调用不成功就利用GetSystemMetrics获取屏幕面积
        rcWA=CRect(0,0,iSX,iSY);
    }
    else
        rcWA=rWorkArea;
    int iX=lpRect->left;
    int iY=lpRect->top;

    if(iX < rcWA.left + DETASTEP && iX!=rcWA.left)
    {//调整左
        //pWnd->SetWindowPos(NULL,rcWA.left,iY,0,0,SWP_NOSIZE);
        lpRect->OffsetRect(rcWA.left-iX,0);
        AdjustPos(lpRect);
        return TRUE;
    }
    if(iY < rcWA.top + DETASTEP && iY!=rcWA.top)
    {//调整上
        //pWnd->SetWindowPos(NULL ,iX,rcWA.top,0,0,SWP_NOSIZE);
        lpRect->OffsetRect(0,rcWA.top-iY);
        AdjustPos(lpRect);
        return TRUE;
    }
    if(iX + lpRect->Width() > rcWA.right - DETASTEP && iX !=rcWA.right-lpRect->Width())
    {//调整右
        //pWnd->SetWindowPos(NULL ,rcWA.right-rcW.Width(),iY,0,0,SWP_NOSIZE);
        lpRect->OffsetRect(rcWA.right-lpRect->right,0);
        AdjustPos(lpRect);
        return TRUE;
    }
    if(iY + lpRect->Height() > rcWA.bottom - DETASTEP && iY !=rcWA.bottom-lpRect
        ->Height())
    {//调整下
        //pWnd->SetWindowPos(NULL ,iX,rcWA.bottom-rcW.Height(),0,0,SWP_NOSIZE);
        lpRect->OffsetRect(0,rcWA.bottom-lpRect->bottom);
        return TRUE;
    }
    return FALSE;
}
//然后在ONMOVEING事件中使用所下过程调用
CRect r=*pRect;
AdjustPos(&r);
*pRect=(RECT)r;

十二、给系统菜单添加一个菜单项

　　给系统菜单添加一个菜单项需要进行下述三个步骤：

　　首先，使用Resource Symbols对话（在View菜单中选择Resource Symbols．．．可以显示该对话）定义菜单项ID，该ID应大于0x0F而小于0xF000；
　　其次，调用CWnd::GetSystemMenu获取系统菜单的指针并调用CWnd:: Appendmenu将菜单项添加到菜单中。下例给系统菜单添加两个新的

int CMainFrame:: OnCreate (LPCREATESTRUCT lpCreateStruct)
{
    //…
    //Make sure system menu item is in the right range.
    ASSERT(IDM_MYSYSITEM<0xF000);
    //Get pointer to system menu.
    CMenu* pSysMenu=GetSystemMenu(FALSE);
    ASSERT_VALID(pSysMenu);
    //Add a separator and our menu item to system menu.
    CString StrMenuItem(_T ("New menu item"));
    pSysMenu->AppendMenu(MF_SEPARATOR);
    pSysMenu->AppendMenu(MF_STRING, IDM_MYSYSITEM, StrMenuItem);
    //…
}