Windows API中的HANDLE和HWND之间的区别? [英] Difference between HANDLE and HWND in Windows API?

问题描述

我正在尝试使用功能SetForegroundWindow(HWND hWnD).我有一些句柄，但不能作为上述函数的参数使用.我的句柄是一个线程，我想在前台运行它.

HWND和HANDLE有什么区别?

解决方案

它们只是抽象数据类型.

根据 MSDN ，HANDLE和HWND定义为:

• HANDLE是对象的句柄.
• HWND是窗口的句柄.

因此，HWND是HANDLE，但并非所有HANDLE都是HWND.实际上:

typedef void *PVOID;
typedef PVOID HANDLE;
typedef HANDLE HWND;

示例

除非您知道自己在做什么，否则应该只将HWND传递给SetForegroundWindow.

HWND hWnd = FindWindow(NULL, "Calculator");
SetForegroundWindow(hWnd);

这首先使用FindWindow获取到名为计算器"的窗口的句柄，然后将该窗口置于前景.

I'm trying to use function SetForegroundWindow(HWND hWnD). I have some handles but it's not working as parameter of above function. My handle is a thread and I want to run it in foreground.

What are the differences between a HWND and a HANDLE?

解决方案

They are just abstract data types.

According to MSDN, HANDLE and HWND are defined as:

• HANDLE is a handle to an object.
• HWND is a handle to a window.

So, a HWND is a HANDLE, but not all HANDLEs are HWND. In fact:

typedef void *PVOID;
typedef PVOID HANDLE;
typedef HANDLE HWND;

Example

You should only pass HWND to SetForegroundWindow unless you know what you are doing.

HWND hWnd = FindWindow(NULL, "Calculator");
SetForegroundWindow(hWnd);

This first gets the handle to a window titled "Calculator" with FindWindow and then brings that window to foreground.

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