如何在 C# 中使用 ListView_GetBkImage 宏
如何使用 ListView_GetBkImage 宏：
http:// /msdn.microsoft.com/en-us/library/bb761246(v=VS.85).aspx
...来自 C#/WinForms 应用程序？我认为这个宏只是包装了 SendMessage 方法，但我不确定。我找不到任何基于 C# 的示例。
基本上我正在尝试获取 LVBKIMAGE ( http ://msdn.microsoft.com/en-us/library/bb774742(v=VS.85).aspx ) 引用桌面背景位图的结构。
How can I use the ListView_GetBkImage macro:
http://msdn.microsoft.com/en-us/library/bb761246(v=VS.85).aspx
... from a C#/WinForms application? I think this macro just wraps the SendMessage method, but I'm not sure. I couldn't find any C#-based samples on this.
Basically I'm trying to get a LVBKIMAGE ( http://msdn.microsoft.com/en-us/library/bb774742(v=VS.85).aspx ) structure that references the Desktop's background bitmap.
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你不能。宏由 C/C++ 编译器在编译时处理，但您想要访问二进制库。您只需在源代码中找到该宏，看看它的作用，然后在 C# 代码中执行相同的操作。它不应该太复杂。如果您还没有 Platform SDK，请下载它并查看文档中提到的 .h 文件。
编辑：好的，所以宏定义为：
SNDMSG简单地定义为SendMessage。 LVM_GETBKIMAGE 是一个整数 - ASCII 版本为 0x1045，Unicode 版本为 0x108B。 （如果您不确定的话，您可能需要 Unicode 版本。）因此整个问题的解决方案是：应该足够容易映射到 C#。使用 Reflector 查看 System.Windows.Forms，了解 Microsoft 如何导入 SendMessage 函数。它将被标记为内部，因此您无法调用它，但可以复制它。
plvbki是一个指向结构的指针 - 您需要创建一个与LVBKIMAGE等效的 C# 版本。事实上，MS 可能也为您做到了这一点，所以请四处寻找。You cannot. A macro is processed at compile time by the C/C++ compiler, but you want to access the binary library. You will just have to find the macro in the source, see what it does and do the same in your C# code. It shouldn't be anything too complex. Download the Platform SDK if you don't already have it and look in the .h file mentioned in the documentation.
Edit: OK, so the macro is defined as:
SNDMSGis simply defined asSendMessage. LVM_GETBKIMAGE is an integer - it's 0x1045 for the ASCII version and 0x108B for the Unicode version. (You probably want the Unicode version if you're unsure.) So the entire thing resolves to:There should be easy enough to map to C#. Look in System.Windows.Forms using Reflector to see how Microsoft have imported the SendMessage function. It will be marked internal, so you cannot call it, but you can copy it.
plvbkiis a pointer to a struct - you'll need to create a C# equivalent ofLVBKIMAGE. Actually, MS have probably done that for you too, so look around for that.