问题
I have the following code that seems to work on one of my projects but it doesn't work on a different one. Code is exactly the same on both but the method EnumWindow never gets executed.
Here is the code:
[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
public static extern Int32 GetClassName(IntPtr hWnd, StringBuilder StrPtrClassName, Int32 nMaxCount);
[System.Runtime.InteropServices.DllImport("user32")]
[return: System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr
public static List<IntPtr> GetChildWindows(IntPtr parent)
{
List<IntPtr> result = new List<IntPtr>();
System.Runtime.InteropServices.GCHandle listHandle = System.Runtime.InteropServices.GCHandle.Alloc(result);
try
{
EnumWindowProc childProc = new EnumWindowProc(EnumWindow);
EnumChildWindows(parent, childProc, System.Runtime.InteropServices.GCHandle.ToIntPtr(listHandle));
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
return result;
}
private static bool EnumWindow(IntPtr handle, IntPtr pointer)
{
System.Runtime.InteropServices.GCHandle gch = System.Runtime.InteropServices.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;
}
What I am trying to do is to get the all the childrens from iexplorer.exe process. The only difference between the two projects is that in one of them I am the one who opens manually an instance of IE and in the other one IE boots from the code.
In both cases, I am able to catch the right Process and the right main windows handle but no idea why in the second project I cannot get any children.
Any idea?
Thanks in advance :)
来源:https://stackoverflow.com/questions/23379238/private-static-bool-enumwindowintptr-handle-intptr-pointer-doesnt-run