如何从图标中提取特定尺寸的图像？
如何从具有多个图像的图标中提取特定尺寸的图像或所有图像？
How can I extract an image of a specific size or all images from an icon with multiple images?
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您没有说明这样做的目的是什么，并且有多种获取图标的方法，并且根据目的，一种方法可能比另一种方法更好。
但是，要从任意文件中提取任意数量的“大”(32x32) 和/或“小”(16x16) 图标*，请使用
ExtractIconEx函数。这使您可以从图标文件 (.ico)、EXE 或 DLL 中提取这两种标准尺寸之一的一个或多个图标。一个图标文件可以包含多个图像，此功能可以让您获取所有图像。该函数将写入句柄数组，您可以将每个句柄分配给
TIcon实例的Handle属性。然后您可以像平常一样使用TIcon方法如果您以其他方式加载 TIcon，则会出现这种情况。请注意，Delphi XE 的新功能是能够通过分配将其轻松复制到位图方法。 那篇文章还展示了如何访问所有库存（内置/标准）Windows 图标，如果这恰好是您想要的。（旁注：我认为
TIcon类让您通过其LoadFromFile方法从文件加载 - 文档中似乎缺少该方法，但我很确定它存在，从记忆中，它只加载一个图标。）You don't say what the purpose of this is, and there are a number of ways of getting icons and one method may be better than another depending on the purpose.
However, to extract any number of "large" (32x32) and/or "small" (16x16) icons* from an arbitrary file, use the
ExtractIconExfunction. This lets you extract one or more icons of either of these two standard sizes from an icon file (.ico), EXE, or DLL. An icon file can contain multiple images and this function will let you get all of them.The function will write to an array of handles, each of which you can assign to the
Handleproperty of aTIconinstance. Then you can use theTIconmethods as you normally would if you'd loaded the TIcon any other way. Note that new to Delphi XE is the ability to copy it easily to a bitmap via the Assign method. That article also shows how to access all of the stock (inbuilt / standard) Windows icons, if that happens to be what you're after.(Side note: I think the
TIconclass lets you load from a file via itsLoadFromFilemethod - this seems to be missing from the documentation, but I'm pretty certain it exists. From memory, that only loads a single icon.)