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        从 C# 修改任何窗口的不透明度

        时间:2023-05-21
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                  本文介绍了从 C# 修改任何窗口的不透明度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  限时送ChatGPT账号..

                  是否可以从 C# 修改所有打开的窗口的不透明度.我用谷歌搜索最小化窗口,我知道它可以通过 pInvoke 调用.它甚至奏效了.同样是否可以从 C# 更改所有打开的窗口的不透明度?

                  Is it possible to modify the opacity of all opened windows from C#. I googled for minimizing the windows and i came to know that its possible with pInvoke calls. It even worked. Similarly is it possible to change the opacity of all the opened windows from C#?

                  另外,我不喜欢 MFC 的东西.还有任何工具可以知道 dll 中公开的 api 列表吗?

                  Also, i am not in to MFC stuffs. Still is there any tools to know the list of apis exposed in a dll?

                  推荐答案

                  你可以使用SetLayeredWindowAttributes API 这样做.

                  检查此 API 的 pInvoke 版本.

                  Check this for the pInvoke version of this API.

                  来自上述链接的示例代码:

                  Sample Code from the above-mentioned link:

                  [DllImport("user32.dll")]
                  static extern bool SetLayeredWindowAttributes(IntPtr hwnd, uint crKey,byte bAlpha, uint dwFlags);
                  
                  public const int GWL_EXSTYLE = -20;
                  public const int WS_EX_LAYERED = 0x80000;
                  public const int LWA_ALPHA = 0x2;
                  public const int LWA_COLORKEY = 0x1;
                  
                  //set the window style to alpha appearance
                  private void button4_Click(object sender, EventArgs e)
                  {
                      SetWindowLong(Handle, GWL_EXSTYLE, GetWindowLong(Handle, GWL_EXSTYLE) ^ WS_EX_LAYERED);
                      SetLayeredWindowAttributes(Handle, 0, 128, LWA_ALPHA);
                  }
                  

                  这篇关于从 C# 修改任何窗口的不透明度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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