Delphi添加自定意消息-让窗体透明，窗口可实现半透明化，窗口在加载时使用了BMP位图，实际上本实例是将BMP透明化，去掉了窗口的标题栏和控制按钮，当然窗口也不可拖动了，重点是BMP位图的透明化处理，值得学习参考一下。-Delphi add custom intended message- transparent form, the window can achieve the translucent window used when loading a bitmap BMP, the instance is actually transparent BMP, remove the window' s title bar and control buttons, of course, window not drag, focusing on BMP bitmap transparency processing, it is worth learning reference.