使用CreateWindowEx创建一个仅消息窗口 [英] Using CreateWindowEx to Make a Message-Only Window

问题描述

我尝试使用 CreateWindowEx 生成一个仅消息窗口：

I'm trying to use CreateWindowEx to generate a message-only window:

_hWnd = CreateWindowEx( 0, NULL, NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL );

当我的应用程序执行此行时，它总是返回 _hWnd = 0 。我做错了什么？我使用Visual Studio 2008.（是吗？j / k）谢谢。

When my application executes this line it always returns _hWnd = 0. What am I doing wrong? I'm using Visual Studio 2008. (Is that it? j/k) Thanks.

推荐答案

lpClassName 不应为 NULL 。使用 RegisterClassEx 函数注册类并将其传递给 CreateWindowEx 。

lpClassName shouldn't be NULL. Register class using RegisterClassEx function and pass it to CreateWindowEx.

static const char* class_name = "DUMMY_CLASS";
WNDCLASSEX wx = {};
wx.cbSize = sizeof(WNDCLASSEX);
wx.lpfnWndProc = pWndProc;        // function which will handle messages
wx.hInstance = current_instance;
wx.lpszClassName = class_name;
if ( RegisterClassEx(&wx) ) {
  CreateWindowEx( 0, class_name, "dummy_name", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL );
}

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