确定窗口是否具有任务栏按钮

Question

我正在寻找一种方法来检查给定窗口是否有任务栏按钮.也就是说,给定窗口的句柄,如果窗口在任务栏中,我需要为TRUE,否则为FALSE.

相反,我想知道是否有办法获得属于给定任务栏按钮的窗口的句柄,我想这需要一种方法来枚举任务栏按钮.

(第一个前者是我需要的部分,后者是可选的.)

非常感谢.

Answer 1

Windows使用启发式方法来决定是否向窗口提供任务栏按钮,有时候在确定之前会有一个延迟,所以100%准确地执行此操作会非常困难.这是规则的粗略开始.有现代风格的标志,使其易于知道,但当缺少这些样式时,任务栏减少到猜测.

首先,您将需要两个窗口样式标志.

LONG Style = GetWindowLong(hwnd, GWL_STYLE);
LONG ExStyle = GetWindowLong(hwnd, GWL_EXSTYLE);

现在的规则,有三个规则是肯定的.

• 如果ExStyle & WS_EX_APPWINDOW,那么TASKBAR
• 如果ExStyle & WS_EX_TOOLWINDOW,然后NOT_TASKBAR
• 如果Style & WS_CHILD那么NOT_TASKBAR

剩下的就是猜测:

• Style & WS_OVERLAPPED 建议TASKBAR
• Style & WS_POPUP 建议NOT_TASKBAR特别是如果 GetParent() != NULL
• ExStyle & WS_EX_OVERLAPPEDWINDOW 建议TASKBAR
• ExStyle & WS_EX_CLIENTEDGE 建议NOT_TASKBAR
• ExStyle & WS_EX_DLGMODALFRAME 建议NOT_TASKBAR

我确信还有其他猜测规则,实际上猜测规则已经从Windows版本变为版本.

Answer 2

1. Toplevel窗口

2. WS_EX_APPWINDOW - >任务栏,无论其他样式!

3. OWNER必须为NULL(GetWindow(窗口,GW_OWNER))

4. no:WS_EX_NOACTIVATE或WS_EX_TOOLWINDOW:

订单很重要.

第二个问题:在windows xp/vista中,可以进入任务栏的进程并获取所有窗口ID:

void EnumTasklistWindows()
{
  int b2 = 0;
  TBBUTTON tbButton;
  DWORD dwProcessId = 0, dwThreadId = 0;

  HWND hDesktop =::GetDesktopWindow();
  HWND hTray =::FindWindowEx(hDesktop, 0, ("Shell_TrayWnd"), NULL);
  HWND hReBar =::FindWindowEx(hTray, 0, ("ReBarWindow32"), NULL);
  HWND hTask =::FindWindowEx(hReBar, 0, ("MSTaskSwWClass"), NULL);
  HWND hToolbar =::FindWindowEx(hTask, 0, ("ToolbarWindow32"), NULL);

  LRESULT count =::SendMessage(hToolbar, TB_BUTTONCOUNT, 0, 0);
  dwThreadId = GetWindowThreadProcessId(hToolbar, &dwProcessId);

  shared_ptr<void> hProcess (OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwProcessId), CloseHandle);
  if (NULL == hProcess.get())
  {
    return;
  }

  memset(&tbButton, 0, sizeof(TBBUTTON));

  for (int i = 0; i < count; i++)
  {
    memset(&tbButton, 0, sizeof(TBBUTTON));

    shared_ptr<void> lpRemoteBuffer (
      VirtualAllocEx(hProcess.get(), NULL, sizeof(TBBUTTON), MEM_COMMIT, PAGE_READWRITE), 
      bind<BOOL>(VirtualFreeEx, hProcess.get(), _1, 0, MEM_RELEASE));
    if (NULL == lpRemoteBuffer.get())
    {
      return;
    }

    SendMessage(hToolbar, TB_GETBUTTON, i, (LPARAM) lpRemoteBuffer.get());

    b2 = ReadProcessMemory(hProcess.get(), lpRemoteBuffer.get(),
      (LPVOID) & tbButton, sizeof(TBBUTTON), NULL);
    if (0 == b2)
    {
      continue;
    }

    BYTE localBuffer[0x1000];
    BYTE *pLocalBuffer = localBuffer;
    DWORD_PTR ipLocalBuffer = (DWORD_PTR) pLocalBuffer;
    pLocalBuffer = localBuffer;
    ipLocalBuffer = (DWORD_PTR) pLocalBuffer;
    DWORD_PTR lpRemoteData = (DWORD_PTR) tbButton.dwData;

    ReadProcessMemory(hProcess.get(), (LPVOID) lpRemoteData, (LPVOID) ipLocalBuffer,
      sizeof(DWORD_PTR), NULL);

    HWND windowHandle;
    memcpy(&windowHandle, (void *) ipLocalBuffer, 4);

    if (windowHandle != NULL)
    {
      trace ("adding button: %x\n", windowHandle);
    }
  }
}

这不再适用于Windows 7了.所以你需要遍历所有的顶层窗户.