如何有效的使用对话框之二

如何有效的使用对话框之二
译者：徐景周(原作：Nishant S )

1. 如何有效地使初始窗口不显示
当我们想让窗口初始时不显示时，通常会用ShowWindow(SW_HIDE) ,但实际上还是在启动是可以看到窗口一闪而过的痕迹。所以，可以使用下面的方法来实现它：
(1.1)先在构造函数中设置布乐变量 visible值为false.

visible = false;

void CTest_deleteDlg::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos) {    if(!visible)        lpwndpos->flags &= ~SWP_SHOWWINDOW;    CDialog::OnWindowPosChanging(lpwndpos);}

visible = true;ShowWindow(SW_SHOW);

2. 对话框的全屏显示

BOOL CFullScrDlgDlg::OnInitDialog(){    CDialog::OnInitDialog();    //...    int cx, cy;     HDC dc = ::GetDC(NULL);     cx = GetDeviceCaps(dc,HORZRES) +         GetSystemMetrics(SM_CXBORDER);     cy = GetDeviceCaps(dc,VERTRES) +        GetSystemMetrics(SM_CYBORDER);     ::ReleaseDC(0,dc);     //去除标题和边框    SetWindowLong(m_hWnd, GWL_STYLE,         GetWindowLong(m_hWnd, GWL_STYLE) &     (~(WS_CAPTION | WS_BORDER)));     // 置对话框为最顶端并扩充到整个屏幕    ::SetWindowPos(m_hWnd, HWND_TOPMOST,         -(GetSystemMetrics(SM_CXBORDER)+1),         -(GetSystemMetrics(SM_CYBORDER)+1),         cx+1,cy+1, SWP_NOZORDER);     //...    return TRUE; }

3. 如何在2K/xp下使窗口获取焦点

//捕捉并设置当前焦点窗口为我们的窗口AttachThreadInput(    GetWindowThreadProcessId(        ::GetForegroundWindow(),NULL),    GetCurrentThreadId(),TRUE);//置我们的为焦点窗口SetForegroundWindow();SetFocus(); //释放threadAttachThreadInput(    GetWindowThreadProcessId(        ::GetForegroundWindow(),NULL),    GetCurrentThreadId(),FALSE);

4. 使你的对话框位于最顶端

SetWindowPos(&this->wndTopMost,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);

void CTest_deleteDlg::OnMakeSmall() {    SetWindowPos(NULL,0,0,200,200,SWP_NOZORDER|SWP_NOMOVE);}void CTest_deleteDlg::OnExpand() {    SetWindowPos(NULL,0,0,500,300,SWP_NOZORDER|SWP_NOMOVE);}

//伸、缩在IDC_DYCREDITS和IDC_COPYRIGHT两STATIC控件间，做为分隔线BOOL CAbout::OnInitDialog() {CDialog::OnInitDialog();//"关于"对话框中对话框可收缩效果CRect Rect1,Rect2;      //对话框收缩时大小GetDlgItem(IDC_DYCREDITS)->GetWindowRect(Rect1); GetDlgItem(IDC_COPYRIGHT)->GetWindowRect(Rect2); m_nReducedHeight = Rect1.Height()+(Rect1.top -Rect2.bottom)/2; //收缩后窗体高度dlgRect.bottom -= (Rect1.Height()+(Rect1.top -Rect2.bottom)/2); MoveWindow(&dlgRect);              //如果要显示对话框起始动态效果的话，不能使用该句m_bVertical=false;     //默认收缩对话框}// ---------------------------------------------------------//名称: OnMore//功能: 是否允许显示//变量: 无//返回: 无//编写: 徐景周，2002.4.8// ---------------------------------------------------------void CAbout::OnMore() {m_bVertical = !m_bVertical; if(m_bVertical == FALSE)//不显示{ SetDlgItemText(ID_MORE,_T("更多>>"));SizeWindow(m_nReducedHeight,true);//m_DyCredits.En