2008年（909）
分类：
2008-05-06 21:27:51
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;(1.2)重载 WM_WINDOWPOSCHANGING，并添加下面代码：
void CTest_deleteDlg::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)
{
if(!visible)
lpwndpos->flags &= ~SWP_SHOWWINDOW;
CDialog::OnWindowPosChanging(lpwndpos);
}
(1.3)然后设布尔visible变量值为true，并在要显示窗口时，再用ShowWindow(SW_SHOW)既可。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thread
AttachThreadInput(
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);5. 如何动态放大/缩小对话框
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);
}
或://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.EndScrolling(); //停止滚动
}
else //显示
{
SetDlgItemText(ID_MORE,_T("<<隐藏"));
SizeWindow(m_nReducedHeight,false);
m_DyCredits.StartScrolling(); //开始滚动
}
UpdateWindow();
}
// ---------------------------------------------------------
// 名称: SizeWindow
// 功能: 伸展或收缩对话框
// 变量: ReduceHeight-收缩高度，bExtend-是否伸展
// 返回: 无
// 编写: 徐景周，2002.4.8
// ---------------------------------------------------------
void CAbout::SizeWindow(int ReduceHeight, bool bExtend)
{
CRect rc;
GetWindowRect(&rc);
if(bExtend)
{
for (int i= 0; i < ReduceHeight; i )
{
rc.bottom--;
MoveWindow(&rc);
}
}
else
{
for (int i= 0; i < ReduceHeight; i )
{
rc.bottom ;
MoveWindow(&rc);
}
}
}
6. 如何让对话框回到屏幕中来SendMessage(DM_REPOSITION);注：它必须是顶端窗口且不是child窗口。
7. 如何给对话框添加或去掉最大/最小化按钮int CTest_deleteDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CDialog::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
SetWindowLong(this->m_hWnd,GWL_STYLE,
GetWindowLong(this->m_hWnd,GWL_STYLE) |
WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
return 0;
}
或用：ModifyStyle (NULL, WS_MAXIMIZEBOX);
8. 改变鼠标指针BOOL CTest_deleteDlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
// TODO: Add your message handler code here and/or call default
SetCursor(AfxGetApp()->LoadStandardCursor(IDC_UPARROW));
// Now we return instead of calling the base class
return 0;
// return CDialog::OnSetCursor(pWnd, nHitTest, message);
}
9. 改变对话框的前景和背景色//红色背景、绿色前景 SetDialogBkColor(RGB(255,0,0),RGB(0,255,0));
10. 在任务条上不显示图标CFrameWnd *abc=new CFrameWnd();
abc->Create(0,0,WS_OVERLAPPEDWINDOW);
CNoTaskBarIconDlg dlg(abc);
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
}
else if (nResponse == IDCANCEL)
{
}
delete abc;
在 OnInitDialog中修改显示风格 WS_EX_APPWINDOW.BOOL CNoTaskBarIconDlg::OnInitDialog()
{
CDialog::OnInitDialog();
ModifyStyleEx(WS_EX_APPWINDOW,0);
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
}
11. 加入上、下文帮助BOOL HelpDialog::OnInitDialog()
{
ModifyStyleEx(0, WS_EX_CONTEXTHELP);
return CDialog::OnInitDialog();
}
重载OnHelpInfo(...)，用显示相关帮助信息BOOL HelpDialog::OnHelpInfo(HELPINFO* pHelpInfo)
{
short state = GetKeyState (VK_F1);
if (state < 0) // F1 key is down, get help for the dialog
return CDialog::OnHelpInfo(pHelpInfo);
else
{ // F1 key not down, get help for specific control
if (pHelpInfo->dwContextId)
WinHelp (pHelpInfo->dwContextId,
HELP_CONTEXTPOPUP);
return TRUE;
}
}
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