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Added User32 EnumChildWindows and GetChildWindow methods

pull/161/head
dahall 2020-08-05 10:39:03 -06:00
parent bbdded72b8
commit ca4a401713
1 changed files with 34 additions and 2 deletions
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36
PInvoke/User32/WinUser.Window.cs
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@ -1,4 +1,5 @@
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
@ -2996,11 +2997,9 @@ namespace Vanara.PInvoke
public static extern bool EndTask(HWND hWnd, [MarshalAs(UnmanagedType.Bool)] bool fShutDown, [MarshalAs(UnmanagedType.Bool)] bool fForce);
/// <summary>
/// <para>
/// Enumerates the child windows that belong to the specified parent window by passing the handle to each child window, in turn, to
/// an application-defined callback function. <c>EnumChildWindows</c> continues until the last child window is enumerated or the
/// callback function returns <c>FALSE</c>.
/// </para>
/// </summary>
/// <param name="hWndParent">
/// <para>Type: <c>HWND</c></para>
@ -3035,6 +3034,28 @@ namespace Vanara.PInvoke
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(HWND hWndParent, EnumWindowsProc lpEnumFunc, IntPtr lParam);
/// <summary>
/// Enumerates the child windows that belong to the specified parent window by passing the handle to each child window, in turn, to
/// an application-defined callback function. <c>EnumChildWindows</c> continues until the last child window is enumerated or the
/// callback function returns <c>FALSE</c>.
/// </summary>
/// <param name="hWndParent">
/// <para>Type: <c>HWND</c></para>
/// <para>
/// A handle to the parent window whose child windows are to be enumerated. If this parameter is <see cref="HWND.NULL"/>, this
/// function is equivalent to EnumWindows.
/// </para>
/// </param>
/// <returns>An ordered sequence of child window handles.</returns>
public static IList<HWND> EnumChildWindows(this HWND hWndParent)
{
var children = new List<HWND>();
Win32Error.ThrowLastErrorIfFalse(EnumChildWindows(hWndParent, EnumProc, default));
return children;
bool EnumProc(HWND hwnd, IntPtr lParam) { children.Add(hwnd); return true; }
}
/// <summary>
/// <para>
/// Enumerates all nonchild windows associated with a thread by passing the handle to each window, in turn, to an application-defined
@ -3402,6 +3423,17 @@ namespace Vanara.PInvoke
[PInvokeData("winuser.h", MSDNShortId = "")]
public static extern HWND GetCapture();
/// <summary>
/// Retrieves the child window at the top of the Z order, if the specified window is a parent window; otherwise, the retrieved
/// handle is NULL. The function examines only child windows of the specified window. It does not examine descendant windows.
/// </summary>
/// <param name="hWnd">A handle to a window.</param>
/// <returns>
/// If the function succeeds, the return value is a window handle. If no window exists with the specified relationship to the
/// specified window, the return value is NULL. To get extended error information, call GetLastError.
/// </returns>
public static HWND GetChildWindow(this HWND hWnd) => GetWindow(hWnd, GetWindowCmd.GW_CHILD);
/// <summary>
/// <para>Retrieves information about a window class.</para>
/// <para>