I am building an applicaton, It will get all control have into application winform is running. First, I can inject dll into application winform is running and get handle of application winform is running. After I get all child window into applcation. Next, I want get all controls into child window by FindWindowEx. But I can't
Here is code :
static ArrayList GetAllChildrenWindowHandles(IntPtr hParent, int maxCount)
{
ArrayList result = new ArrayList();
int ct = 0;
IntPtr prevChild = IntPtr.Zero;
IntPtr currChild = IntPtr.Zero;
while (true && ct < maxCount)
{
currChild = FindWindowEx(hParent, prevChild, null, null);
if (currChild == IntPtr.Zero)
{
int errorCode = Marshal.GetLastWin32Error();
break;
}
result.Add(currChild);
prevChild = currChild;
++ct;
}
return result;
}
I get a handle of child window and use it is parent. But I can't get all control into child window by FindWindowEx . Sorry for my english
解决方案
You can use the code below. Put it into a helper class somewhere, and e.g. use it like this...
var hwndChild = EnumAllWindows(hwndTarget, childClassName).FirstOrDefault();
You can 'lose' the class check if you wish - but usually you're checking for a specific target.
You may also wanna check this post I made a while go - which is using this method to set a focus on a remote window (and those scenarios are quite common, and you'll hit that snag sooner or later).
Pinvoke SetFocus to a particular control
public delegate bool Win32Callback(IntPtr hwnd, IntPtr lParam);
[DllImport("user32.Dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr parentHandle, Win32Callback callback, IntPtr lParam);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static public extern IntPtr GetClassName(IntPtr hWnd, System.Text.StringBuilder lpClassName, int nMaxCount);
private static bool EnumWindow(IntPtr handle, IntPtr pointer)
{
GCHandle gch = GCHandle.FromIntPtr(pointer);
List<IntPtr> list = gch.Target as List<IntPtr>;
if (list == null)
throw new InvalidCastException("GCHandle Target could not be cast as List<IntPtr>");
list.Add(handle);
return true;
}
public static List<IntPtr> GetChildWindows(IntPtr parent)
{
List<IntPtr> result = new List<IntPtr>();
GCHandle listHandle = GCHandle.Alloc(result);
try
{
Win32Callback childProc = new Win32Callback(EnumWindow);
EnumChildWindows(parent, childProc, GCHandle.ToIntPtr(listHandle));
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
return result;
}
public static string GetWinClass(IntPtr hwnd)
{
if (hwnd == IntPtr.Zero)
return null;
StringBuilder classname = new StringBuilder(100);
IntPtr result = GetClassName(hwnd, classname, classname.Capacity);
if (result != IntPtr.Zero)
return classname.ToString();
return null;
}
public static IEnumerable<IntPtr> EnumAllWindows(IntPtr hwnd, string childClassName)
{
List<IntPtr> children = GetChildWindows(hwnd);
if (children == null)
yield break;
foreach (IntPtr child in children)
{
if (GetWinClass(child) == childClassName)
yield return child;
foreach (var childchild in EnumAllWindows(child, childClassName))
yield return childchild;
}
}
我正在构建一个应用程序，它会得到所有的控制已经进入应用程序winform正在运行。首先，我可以注入dll到应用程序winform正在运行，并获得应用程序winform正在运行的句柄。后我得到所有的孩子窗口进入应用。接下来，我想通过FindWindowEx将所有控件都放到子窗口中。但我不能
这里是代码：
GetAllChildrenWindowHandles（IntPtr hParent，int maxCount）
{
ArrayList result = new ArrayList（）;
intct = 0;
IntPtr prevChild = IntPtr.Zero;
IntPtr currChild = IntPtr.Zero;
while（true& ct< maxCount）
{
currChild = FindWindowEx（hParent，prevChild，null，null）;
if（currChild == IntPtr.Zero）
{
int errorCode = Marshal.GetLastWin32Error（）;
break;
}
result.Add（currChild）;
prevChild = currChild;
++ ct;
}
return result;
}
我得到一个子窗口的句柄，但我不能通过FindWindowEx的所有控制到子窗口。
对不起我的英语
解决方案
您可以使用下面的代码。把它放在一个帮助类的某个地方，使用它像这样...
var hwndChild = EnumAllWindows（hwndTarget，childClassName）.FirstOrDefault
您可以'输掉' class 如果你愿意 - 但通常你正在检查一个特定的目标。
您可能也想检查这篇文章我做了一段时间 - 这是使用
此方法设置一个焦点远程窗口（这些情况是
很常见，你会迟早击中那个钩子）。
Pinvoke SetFocus到特定控件
public delegate bool Win32Callback（IntPtr hwnd，IntPtr lParam）;
[DllImport（user32.Dll）]
[return：MarshalAs（UnmanagedType.Bool）]
public static extern bool EnumChildWindows（IntPtr parentHandle，Win32Callback callback，IntPtr lParam ）;
[DllImport（user32.dll，CharSet = CharSet.Auto）]
static public extern IntPtr GetClassName（IntPtr hWnd，System.Text.StringBuilder lpClassName，int nMaxCount）;
private static bool EnumWindow（IntPtr handle，IntPtr pointer）
{
GCHandle gch = GCHandle.FromIntPtr（pointer）;
List< IntPtr> list = gch.Target as List< IntPtr> ;;
if（list == null）
throw new InvalidCastException（GCHandle Target could not be cast as List< IntPtr>）;
list.Add（handle）;
return true;
}
public static List< IntPtr> GetChildWindows（IntPtr parent）
{
List< IntPtr> result = new List< IntPtr>（）;
GCHandle listHandle = GCHandle.Alloc（result）;
try
{
Win32Callback childProc = new Win32Callback（EnumWindow）;
EnumChildWindows（parent，childProc，GCHandle.ToIntPtr（listHandle））;
}
finally
{
if（listHandle.IsAllocated）
listHandle.Free（）;
}
return result;
}
public static string GetWinClass（IntPtr hwnd）
{
if（hwnd == IntPtr.Zero）
return null;
StringBuilder classname = new StringBuilder（100）;
IntPtr result = GetClassName（hwnd，classname，classname.Capacity）;
if（result！= IntPtr.Zero）
return classname.ToString（）;
return null;
}
public static IEnumerable< IntPtr> EnumAllWindows（IntPtr hwnd，string childClassName）
{
List< IntPtr> children = GetChildWindows（hwnd）;
if（children == null）
yield break;
foreach（子进程中的IntPtr子进程）
{
if（GetWinClass（child）== childClassName）
yield return child;
foreach（var childchild in EnumAllWindows（child，childClassName））
yield return childchild;
}
}