如何更改对话框的不透明度? [英] How Can I Change the Opacity of a Dialog?

问题描述

我有一个对话框，用于在:: OnCreate中创建一个窗口.我想更改该对话框的不透明度，而不是窗口.我也将此代码放在:: Oncreate中(在创建CWnd的代码之前):

I have a Dialog that creates a window in ::OnCreate. I want to change the opacity of this dialog not the window. I Put this code in ::Oncreate too (before the code creating CWnd):

LONG ExtendedStyle = GetWindowLong( GetSafeHwnd(), GWL_EXSTYLE );
SetWindowLong( GetSafeHwnd(), GWL_EXSTYLE, ExtendedStyle | WS_EX_LAYERED );
SetLayeredWindowAttributes( 0, 100, LWA_ALPHA );

该代码使Dialog和Window都透明.

this code makes both Dialog and Window transparent.
How can I set this attribute in my desired way?

推荐答案

尝试这种方式:

Try it this way:

ModifyStyleEx(0, WS_EX_LAYERED);
SetLayeredWindowAttributes(0, 255 * 0.50, LWA_ALPHA);

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