题
我们怎样才能得到一个没有标题的窗口的句柄呢?有没有一种方法可以枚举桌面上的所有窗口并过滤没有标题的窗口(在我的情况下,只有一个)并获取它的句柄..或者通过指定其他属性,例如具有特定按钮或列表框等的窗口......
解决方案
此应该这样做:
...
using System.Runtime.InteropServices;
using System.Diagnostics;
...
public class foo()
{
...
[DllImport ("user32")]
internal static extern int GetWindowText (int hWnd, String text, int nMaxCount);
[DllImport ("user32.dll")]
public static extern int GetWindowTextLength (int hWnd);
[DllImport ("user32.dll")]
public static extern int FindWindow (String text, String class_name);
[DllImport ("user32.dll")]
public static extern int FindWindowEx (int parent, int start, String class_name);
[DllImport ("user32.dll")]
public static extern int GetWindow (int parent, uint cmd);
public List<int> FindTitlelessWindows()
{
List<int> titleless = new List<int> ();
Process [] procs = Process.GetProcesses ();
IntPtr hWnd;
foreach (Process proc in procs)
{
hWnd = proc.MainWindowHandle;
if (hWnd != IntPtr.Zero)
{
TraverseHierarchy (hWnd.ToInt32 (), 0, titleless);
}
}
foreach (int i in titleless)
{
System.Console.WriteLine (i);
}
return titleless;
}
public void TraverseHierarchy (int parent, int child, List<int> titleless)
{
String text = "";
GetWindowText (parent, text, GetWindowTextLength (parent));
if (String.IsNullOrEmpty (text))
{
titleless.Add (parent);
}
TraverseChildern (parent, titleless);
TraversePeers (parent, child, titleless);
}
public void TraverseChildern(int handle, List<int> titleless)
{
// First traverse child windows
const uint GW_CHILD = 0x05;
int child = GetWindow (handle, GW_CHILD);
if (0 != child)
{
TraverseHierarchy (child, 0, titleless);
}
}
public void TraversePeers(int parent, int start, List<int> titleless)
{
// Next traverse peers
int peer = FindWindowEx(parent, start, "");
if (0 != peer)
{
TraverseHierarchy (parent, peer, titleless);
}
}
}
其他提示
看一看的EnumChildWindows功能。
我认为,如果你在主窗口(即桌面)这个函数的指针传递,你将能够得到所有窗口及其子窗口的列表。
在结合FindWindow函数应该可以,一旦你找到一个预期的子控件得到你想要的句柄的窗口。
像这样的东西应该有效, 未测试
[DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
internal static extern int GetWindowText(IntPtr hWnd, [Out, MarshalAs(UnmanagedType.LPTStr)] StringBuilder lpString, int nMaxCount);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern int GetWindowTextLength(IntPtr hWnd);
....
Process[] procs = Process.GetProcesses();
IntPtr hWnd;
foreach(Process proc in procs)
{
hWnd = proc.MainWindowHandle;
if (hWnd != IntPtr.Zero)
{
int length = GetWindowTextLength(hWnd);
StringBuilder sb = new StringBuilder(length + 1);
GetWindowText(hWnd, sb, length);
if (String.IsNullOrEmpty(sb.ToString())
{
// we have a window with no title!
}
}
}
http://msdn.microsoft.com/ EN-US /库/ ms633558(VS.85)的.aspx
如果没有窗口光标下方WindowFromPoint返回句柄,或空。难道这是使用的,或者是你想的过程自动化?
这里你可以找到一个库来应对托管代码窗口API的东西。结果 下载DLL和你的项目中引用它,并从那里它很容易 得到你想要的任何窗口上的任何信息;
void ForAllSystemWindows()
{
foreach (SystemWindow window in SystemWindow.AllToplevelWindows)
{
if (window.Title == string.Empty)
{
//Found window without title
//Get window handle
IntPtr windowhandle = window.HWnd;
//Do other stuff ..
}
}
}
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