怎样生成象东方快车那样位于屏幕上方的窗口！
怎样生成象东方快车(或金山快译)那样位于屏幕上方的窗口！这窗口应有自动隐藏功能且不会因按下了Windows中的显示桌面图标而最小化！！！知道的请回答，给分还可加！ 问题点数：59、回复次数：11Top
1 楼zhq2000（方舟）回复于 2000-10-31 22:21:00 得分 11
是Application Desktop Toolbars 编程。
用SHAppBarMessage进行注册，删除，定位，处理通知及自动隐藏。
typedef struct _AppBarData{
DWORD cbSize; //结构大小
HWND hWnd; //要注册为AppBar的窗口句柄
UINT uCallbackMessage; //为任何通知发送的消息ID
UINT uEdge; //所处边缘 ABE_TOP , ABE_LEFT , ABE_.....
RECT rc; //AppBar 尺寸
LPARAM lParam; //自定义参数
}APPBARDATA, *PAPPBARDATA;
WINSHELLAPI UINT PEENTRY SHAppBarMessage(DWORD dwMessage,PAPPBARDATA pData);
dwMessage为：
ABM_NEW 注册
ABM_QUERYPOS 查询位置
ABM_SETPOS 设置位置
ABM_SETAUTOHIDEBAR 自动隐藏
ABM_REMOVE 删除 AppBar;
Top
2 楼actinia（海葵）回复于 2000-10-31 22:58:00 得分 0
关注！Top
3 楼Ton2000（小顽童XP）回复于 2000-11-01 08:49:00 得分 0
zhq2000,谢谢你,能给我一段例代码吗?再次感谢!Top
4 楼easypaper（）回复于 2000-11-01 10:17:00 得分 0
在MSDN里面，有很多例子，搜索SHAppBarMessage，会有很多，带源程序，不过是用VC写的。很容易看懂的。
有一篇文章，Using Application Desktop Toolbars，写得很好。
里面有好多例子。Top
5 楼Ton2000（小顽童XP）回复于 2000-11-01 15:39:00 得分 0
easypaper，我经常听到MSDN，但我一直没搞清楚MSDN是什么意思？请不吝指教，谢谢！
再一，你说的那篇文章可以发给我吗？非常感谢！Top
6 楼Ton2000（小顽童XP）回复于 2000-11-01 15:42:00 得分 0
easypaper，我经常听到MSDN，但我一直没搞清楚MSDN是什么意思？请不吝指教，谢谢！
再一，你说的那篇文章可以发给我吗？非常感谢！Top
7 楼easypaper（）回复于 2000-11-01 19:57:00 得分 0
MSDN是微软出的开发文档，内容很详细，几乎可以找到你所需要的任何东西。可以说是开发人员必读。只不过c++比较多，而不是c++Builder或者Delphi，不过，对于任何开发人员，都应该仔细阅读的。
下面是文章，C（API）写的，不过应该对你有一定的帮助。文章很长，
Using Application Desktop Toolbars
An application desktop toolbar (also called an appbar) is a window that is similar to the Microsoft® Windows® taskbar. It is anchored to an edge of the screen, and it typically contains buttons that give the user quick access to other applications and windows. The system prevents other applications from using the desktop area occupied by an appbar. Any number of appbars can exist on the desktop at any given time.
About Application Desktop Toolbars
Using Application Desktop Toolbars
About Application Desktop Toolbars
Windows provides an application programming interface (API) that lets you take advantage of appbar services provided by the system. The services help ensure that application-defined appbars operate smoothly with one another and with the taskbar. The system maintains information about each appbar and sends the appbars messages to notify them about events that can affect their size, position, and appearance.
Sending Messages
An application uses a special set of messages, called appbar messages, to add or remove an appbar, set an appbar's size and position, and retrieve information about the size, position, and state of the taskbar. To send an appbar message, an application must use the SHAppBarMessage function. The function's parameters include a message identifier, such as ABM_NEW, and the address of an APPBARDATA structure. The structure members contain information that the system needs to process the given message.
For any given appbar message, the system uses some members of the APPBARDATA structure and ignores the others. However, the system always uses the cbSize and hWnd members, so an application must fill these members for every appbar message. The cbSize member specifies the size of the structure, and the hWnd member is the handle to the appbar's window.
Some appbar messages request information from the system. When processing these messages, the system copies the requested information into the APPBARDATA structure.
Registration
The system keeps an internal list of appbars and maintains information about each bar in the list. The system uses the information to manage appbars, perform services for them, and send them notification messages.
An application must register an appbar (that is, add it to the internal list) before it can receive appbar services from the system. To register an appbar, an application sends the ABM_NEW message. The accompanying APPBARDATA structure includes the handle to the appbar's window and an application-defined message identifier. The system uses the message identifier to send notification messages to the window procedure of the appbar window. For more information about appbar notification messages, see Appbar Notification Messages.
An application unregisters an appbar by sending the ABM_REMOVE message. Unregistering an appbar removes it from the system's internal list of appbars. The system no longer sends notification messages to the appbar or prevents other applications from using the screen area occupied by the appbar. An application should always send ABM_REMOVE before destroying an appbar.
Appbar Size and Position
An application should set an appbar's size and position so that it does not interfere with any other appbars or the taskbar. Every appbar must be anchored to a particular edge of the screen, and multiple appbars can be anchored to an edge. However, if an appbar is anchored to the same edge as the taskbar, the system ensures that the taskbar is always on the outermost edge.
To set the size and position of an appbar, an application first proposes a screen edge and bounding rectangle for the appbar by sending the ABM_QUERYPOS message. The system determines whether any part of the screen area within the proposed rectangle is occupied by the taskbar or another appbar, adjusts the rectangle (if necessary), and returns the adjusted rectangle to the application.
Next, the application sends the ABM_SETPOS message to set the new bounding rectangle for the appbar. Again, the system may adjust the rectangle before returning it to the application. For this reason, the application should use the adjusted rectangle returned by ABM_SETPOS to set the final size and position. The application can use the MoveWindow function to move the appbar into position.
By using a two-step process to set the size and position, the system allows the application to provide intermediate feedback to the user during the move operation. For example, if the user drags an appbar, the application might display a shaded rectangle indicating the new position before the appbar actually moves.
An application should set the size and position of its appbar after registering it and whenever the appbar receives the ABN_POSCHANGED notification message. An appbar receives this notification message whenever a change occurs in the taskbar's size, position, or visibility state and whenever another appbar on the same side of the screen is resized, added, or removed.
Whenever an appbar receives the WM_ACTIVATE message, it should send the ABM_ACTIVATE message. Similarly, when an appbar receives a WM_WINDOWPOSCHANGED message, it must call ABM_WINDOWPOSCHANGED. Sending these messages ensures that the system properly sets the z-order of any autohide appbars on the same edge.
Autohide Application Desktop Toolbars
An autohide appbar is one that is normally hidden but becomes visible when the user moves the mouse cursor to the screen edge with which the appbar is associated. The appbar hides itself again when the user moves the mouse cursor out of the bar's bounding rectangle.
Although the system allows a number of different appbars at any given time, it allows only one autohide appbar at a time for each screen edge on a first come, first served basis. The system automatically maintains the z-order of an autohide appbar (within its z-order group only).
An application uses the ABM_SETAUTOHIDEBAR message to register or unregister an autohide appbar. The message specifies the edge for the appbar and a flag that specifies whether the appbar is to be registered or unregistered. The message fails if an autohide appbar is being registered but one is already associated with the specified edge. An application can retrieve the handle to the autohide appbar associated with an edge by sending the ABM_GETAUTOHIDEBAR message.
An autohide appbar does not need to register as a normal appbar; that is, it does not need to be registered by sending the ABM_NEW message. An appbar that is not registered by ABM_NEW overlaps any appbars anchored on the same edge of the screen.
Appbar Notification Messages
The system sends messages to notify an appbar about events that can affect its position and appearance. The messages are sent in the context of an application-defined message. The application specifies the identifier of the message when it sends the ABM_NEW message to register the appbar. The notification code is in the wParam parameter of the application-defined message.
An appbar receives the ABN_POSCHANGED notification message when the taskbar's size, position, or visibility state changes, when another appbar is added to the same edge of the screen, or when another appbar on the same edge of the screen is resized or removed. An appbar should respond to this notification message by sending ABM_QUERYPOS and ABM_SETPOS messages. If an appbar's position has changed, it should call the MoveWindow function to move itself to the new position.
The system sends the ABN_STATECHANGE notification message whenever the taskbar's autohide or always-on-top state has changed—that is, when the user selects or clears the "Always on top" or "Auto hide" check box on the taskbar's property sheet. An appbar can use this notification message to set its state to conform to that of the taskbar, if desired.
When a full-screen application is started or when the last full-screen application is closed, an appbar receives the ABN_FULLSCREENAPP notification message. The lParam parameter indicates whether the full-screen application is opening or closing. If it is opening, the appbar must drop to the bottom of the z-order. The appbar should restore its z-order position when the last full-screen application has closed.
An appbar receives the ABN_WINDOWARRANGE notification message when the user selects the Cascade, Tile Horizontally, or Tile Vertically command from the taskbar's context menu. The system sends the message two times—before rearranging the windows (lParam is TRUE) and after arranging the windows (lParam is FALSE).
An appbar can use ABN_WINDOWARRANGE messages to exclude itself from the cascade or tile operation. To exclude itself, the appbar should hide itself when lParam is TRUE and show itself when lParam is FALSE. If an appbar hides itself in response to this message, it does not need to send the ABM_QUERYPOS and ABM_SETPOS messages in response to the cascade or tile operation.
Using Application Desktop Toolbars
This section includes examples that demonstrate how to perform the following tasks:
Registering an application desktop toolbar (appbar)
Setting the appbar size and position
Processing appbar notification messages
Registering an Application Desktop Toolbar
An application must register an appbar by sending the ABM_NEW message. Registering an appbar adds it to the system's internal list and provides the system with a message identifier to use to send notification messages to the appbar. Before exiting, an application must unregister the appbar by sending the ABM_REMOVE message. Unregistering removes the appbar from the system's internal list and prevents the bar from receiving appbar notification messages.
The function in the following example either registers or unregisters an appbar, depending on the value of a Boolean flag parameter.
// RegisterAccessBar - registers or unregisters an appbar.
// Returns TRUE if successful, or FALSE otherwise.
// hwndAccessBar - handle to the appbar
// fRegister - register and unregister flag
//
// Global variables
// g_uSide - screen edge (defaults to ABE_TOP)
// g_fAppRegistered - flag indicating whether the bar is registered
BOOL RegisterAccessBar(HWND hwndAccessBar, BOOL fRegister)
{
APPBARDATA abd;
// Specify the structure size and handle to the appbar.
abd.cbSize = sizeof(APPBARDATA);
abd.hWnd = hwndAccessBar;
if (fRegister) {
// Provide an identifier for notification messages.
abd.uCallbackMessage = APPBAR_CALLBACK;
// Register the appbar.
if (!SHAppBarMessage(ABM_NEW, &abd))
return FALSE;
g_uSide = ABE_TOP; // default edge
g_fAppRegistered = TRUE;
} else {
// Unregister the appbar.
SHAppBarMessage(ABM_REMOVE, &abd);
g_fAppRegistered = FALSE;
}
return TRUE;
}
Setting the Appbar Size and Position
An application should set an appbar's size and position after registering the appbar, after the user user moves or sizes the appbar, and whenever the appbar receives the ABN_POSCHANGED notification message. Before setting the size and position of the appbar, the application queries the system for an approved bounding rectangle by sending the ABM_QUERYPOS message. The system returns a bounding rectangle that does not interfere with the taskbar or any other appbar. The system adjusts the rectangle purely by rectangle subtraction; it makes no effort to preserve the rectangle's initial size. For this reason, the appbar should readjust the rectangle, as necessary, after sending ABM_QUERYPOS.
Next, the application passes the bounding rectangle back to the system by using the ABM_SETPOS message. Then it calls the MoveWindow function to move the appbar into position.
The following example shows how to set an appbar's size and position.
// AppBarQuerySetPos - sets the size and position of an appbar.
// uEdge - screen edge to which the appbar is to be anchored
// lprc - current bounding rectangle of the appbar
// pabd - address of the APPBARDATA structure with the hWnd and
// cbSize members filled
void PASCAL AppBarQuerySetPos(UINT uEdge, LPRECT lprc, PAPPBARDATA pabd)
{
int iHeight = 0;
int iWidth = 0;
pabd->rc = *lprc;
pabd->uEdge = uEdge;
// Copy the screen coordinates of the appbar's bounding
// rectangle into the APPBARDATA structure.
if ((uEdge == ABE_LEFT) ||
(uEdge == ABE_RIGHT)) {
iWidth = pabd->rc.right - pabd->rc.left;
pabd->rc.top = 0;
pabd->rc.bottom = GetSystemMetrics(SM_CYSCREEN);
} else {
iHeight = pabd->rc.bottom - pabd->rc.top;
pabd->rc.left = 0;
pabd->rc.right = GetSystemMetrics(SM_CXSCREEN);
}
// Query the system for an approved size and position.
SHAppBarMessage(ABM_QUERYPOS, pabd);
// Adjust the rectangle, depending on the edge to which the
// appbar is anchored.
switch (uEdge) {
case ABE_LEFT:
pabd->rc.right = pabd->rc.left + iWidth;
break;
case ABE_RIGHT:
pabd->rc.left = pabd->rc.right - iWidth;
break;
case ABE_TOP:
pabd->rc.bottom = pabd->rc.top + iHeight;
break;
case ABE_BOTTOM:
pabd->rc.top = pabd->rc.bottom - iHeight;
break;
}
// Pass the final bounding rectangle to the system.
SHAppBarMessage(ABM_SETPOS, pabd);
// Move and size the appbar so that it conforms to the
// bounding rectangle passed to the system.
MoveWindow(pabd->hWnd, pabd->rc.left, pabd->rc.top,
pabd->rc.right - pabd->rc.left,
pabd->rc.bottom - pabd->rc.top, TRUE);
}
Processing Appbar Notification Messages
An appbar receives a notification message when the state of the taskbar changes, when a full-screen application starts (or the last one closes), or when an event occurs that can affect the appbar's size and position. The following example shows how to process the various notification messages.
// AppBarCallback - processes notification messages sent by the system.
// hwndAccessBar - handle to the appbar
// uNotifyMsg - identifier of the notification message
// lParam - message parameter
void AppBarCallback(HWND hwndAccessBar, UINT uNotifyMsg,
LPARAM lParam)
{
APPBARDATA abd;
UINT uState;
abd.cbSize = sizeof(abd);
abd.hWnd = hwndAccessBar;
switch (uNotifyMsg) {
case ABN_STATECHANGE:
// Check to see if the taskbar's always-on-top state has
// changed and, if it has, change the appbar's state
// accordingly.
uState = SHAppBarMessage(ABM_GETSTATE, &abd);
SetWindowPos(hwndAccessBar,
(ABS_ALWAYSONTOP & uState) ? HWND_TOPMOST : HWND_BOTTOM,
0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
break;
case ABN_FULLSCREENAPP:
// A full-screen application has started, or the last full-
// screen application has closed. Set the appbar's
// z-order appropriately.
if (lParam) {
SetWindowPos(hwndAccessBar,
(ABS_ALWAYSONTOP & uState) ?
HWND_TOPMOST : HWND_BOTTOM,
0, 0, 0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
} else {
uState = SHAppBarMessage(ABM_GETSTATE, &abd);
if (uState & ABS_ALWAYSONTOP)
SetWindowPos(hwndAccessBar, HWND_TOPMOST,
0, 0, 0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
}
case ABN_POSCHANGED:
// The taskbar or another appbar has changed its
// size or position.
AppBarPosChanged(&abd);
break;
}
}
The following function adjusts an appbar's bounding rectangle and then calls the application-defined AppBarQuerySetPos function (included in the previous section) to set the bar's size and position accordingly.
// AppBarPosChanged - adjusts the appbar's size and position.
// pabd - address of an APPBARDATA structure that contains information
// used to adjust the size and position
void PASCAL AppBarPosChanged(PAPPBARDATA pabd)
{
RECT rc;
RECT rcWindow;
int iHeight;
int iWidth;
rc.top = 0;
rc.left = 0;
rc.right = GetSystemMetrics(SM_CXSCREEN);
rc.bottom = GetSystemMetrics(SM_CYSCREEN);
GetWindowRect(pabd->hWnd, &rcWindow);
iHeight = rcWindow.bottom - rcWindow.top;
iWidth = rcWindow.right - rcWindow.left;
switch (g_uSide) {
case ABE_TOP:
rc.bottom = rc.top + iHeight;
break;
case ABE_BOTTOM:
rc.top = rc.bottom - iHeight;
break;
case ABE_LEFT:
rc.right = rc.left + iWidth;
break;
case ABE_RIGHT:
rc.left = rc.right - iWidth;
break;
}
AppBarQuerySetPos(g_uSide, &rc, pabd);
}
Top
8 楼Ton2000（小顽童XP）回复于 2000-11-01 20:45:00 得分 0
谢谢你easypaper，你能告诉我哪儿能得到MSDN文档吗？
请告诉我，马上给分！Top
9 楼easypaper（）回复于 2000-11-02 13:59:00 得分 0
D版盘，两张，到市场上看看，有很多。如果找不到，VisualStudio里面有（共六章盘）Top
