VC++ EnumChildWindows

最新推荐文章于 2021-04-09 10:59:10 发布

原创最新推荐文章于 2021-04-09 10:59:10 发布 · 5k 阅读

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#vc++ #callback #function #windows #each #null

本文详细介绍了枚举子窗口函数EnumChildWindows的功能及用法。该函数通过遍历指定父窗口的所有子窗口，并将每个子窗口句柄传递给应用程序定义的回调函数来实现其功能。文章还提及了函数参数的具体含义及其返回值。

EnumChildWindows Function

The EnumChildWindows function 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. EnumChildWindows continues until the last child window is enumerated or the callback function returns FALSE.

Syntax

BOOL EnumChildWindows(      
    HWND hWndParent,
    WNDENUMPROC lpEnumFunc,
    LPARAM lParam
);

Parameters

hWndParent
[in] Handle to the parent window whose child windows are to be enumerated. If this parameter is NULL, this function is equivalent to EnumWindows.
Windows 95/98/Me: hWndParent cannot be NULL.

lpEnumFunc
[in] Pointer to an application-defined callback function. For more information, see EnumChildProc.
lParam
[in] Specifies an application-defined value to be passed to the callback function.

Return Value

Remarks

If a child window has created child windows of its own, EnumChildWindows enumerates those windows as well.

A child window that is moved or repositioned in the Z order during the enumeration process will be properly enumerated. The function does not enumerate a child window that is destroyed before being enumerated or that is created during the enumeration process.

Example

For an example see Destroying a Window.